Q&A for How to Make a Ratio

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  • Question
    Can you help me solve this ratio: 200 to 75?
    Donagan
    Top Answerer
    Reduce the fraction 200/75 to the lowest terms possible. Dividing each number by 25 gives you the fraction 8/3. That's the ratio you're looking for (because it won't reduce any further). So 200:75 is the same ratio as 8:3.
  • Question
    How do I turn 3 numbers into a ratio?
    Donagan
    Top Answerer
    x:y:z.
  • Question
    A bag contains 126 marbles, some green some clear. The ratio of green to clear is 4:5. How many clear marbles are in the bag?
    Donagan
    Top Answerer
    Add together the numbers of the ratio: 4 + 5 = 9. Divide 9 into the total number of marbles: 126 ÷ 9 = 14. Multiply 14 by 4 and 14 by 5 to get 56 and 70. Those are the numbers of green and clear marbles respectively.
  • Question
    I have 9 green triangles and 1 yellow triangle. What is the ratio?
    Donagan
    Top Answerer
    9:1
  • Question
    If I don't know one of the numbers, what do I write to represent it?
    Donagan
    Top Answerer
    Choose any letter to represent it.
  • Question
    What's the ratio of 3400 to 8423?
    Donagan
    Top Answerer
    Consider it as a fraction: 3400 / 8423. Reduce the fraction to the lowest terms possible. That gives you the ratio you're looking for. It's roughly 17:42.
  • Question
    A cylinder has a height to diameter ratio of 3:1. How do I get the height of the cylinder from the ratio?
    Donagan
    Top Answerer
    You would have to know the diameter, then multiply by 3.
  • Question
    How can 180 be turned into a 2:3 ratio?
    Donagan
    Top Answerer
    If you want to divide 180 into two numbers whose ratio is 2:3, do this: add 2 + 3 = 5. Divide 180 by 5 = 36. Multiply 36 by 2, which is 72. Multiply 36 by 3, which is 108. 72 and 108 are the two numbers you're looking for.
  • Question
    If a school suspends 1,703 students every year out of a student population of 11,777, what is the ratio and how do I find it?
    Donagan
    Top Answerer
    The ratio is simply 1,703 : 11,777. You can't reduce or simplify that ratio, because no number will divide evenly into both of those numbers.
  • Question
    Some mangoes were shared between me and my friend in the ratio of 3:5 respectively. If my share was 120, how many mangoes were shared between my friend?
    Donagan
    Top Answerer
    The easiest way to do this is to recognize that the ratio of your mangoes to total mangoes is 3:8. Then set up the proportion 3 / 8 = 120 / x, where x is the total number of mangoes. Cross-multiply: 3x = (8)(120) = 960, so that x = 320. To check the answer, if the total is 320, and you have 120, that means your friend has 200, and the ratio of 120:200 does indeed reduce to 3:5.
  • Question
    The ratio of length of room to breadth is 5:3; by how many times is the length of the room longer than the breadth?
    Donagan
    Top Answerer
    You're asking how many times larger than 3 is 5. 5 is 2 larger than 3. 2 is 2/3 of 3. That means that 5 is 2/3 larger than 3.
  • Question
    How do I convert a ratio of a decimal into a simple ratio?
    Donagan
    Top Answerer
    Multiply both terms of the ratio by a multiple of ten in order to eliminate the decimal point (without changing the value of the ratio), and then reduce if possible (again leaving the value unchanged). For example, you could take the ratio 2.5 : 7.5, and multiply both terms by ten to get rid of the decimals: the ratio becomes 25:75, which reduces to 1:3.
  • Question
    What is a ratio of 1:3?
    Donagan
    Top Answerer
    A ratio of 1:3 means that for every one of the first item or number, there are three of the second item or number.
  • Question
    What is 3.1 to 31 as a ratio?
    Donagan
    Top Answerer
    Because 3.1 is exactly ten times smaller than 31, their ratio is 1:10.
  • Question
    Ratio 1:3:5; I have 15 kg cement, 85 kg sand and 100 kg gravel. Do I have enough materials to make the concrete mix?
    Community Answer
    Using that ratio, you could make this much mix: 15 kg cement, 45 kg sand, and 75 kg gravel (with some sand and gravel left over). Whether that is enough mix depends on the requirements of the job.
  • Question
    A recipe uses 12 cups of water for every 5 cups of chocolate. If one wants to make recipe using 8 cups of water, how much chocolate does one need?
    Donagan
    Top Answerer
    You would cross-multiply to find the answer. Let x be the number of cups of chocolate needed. Then 12 / 5 = 8 / x. Cross-multiply: (12)(x) = (5)(8) = 40. So x = 40/12 = 10/3 = 3 1/3 cups of chocolate.
  • Question
    A chicken must be cooked for 50 minutes per kilogram. Write this information as a ratio in its simplest form.
    Donagan
    Top Answerer
    The ratio in simplest form is 50 min : 1 kg.
  • Question
    The expected income for selling pizzas in weekend is R100 000, calculate the expected number of pizzas to be sold on suturday if the ratio is 6:5:1?
    Donagan
    Top Answerer
    Before you can calculate that, you have to know the price of each pizza.
  • Question
    Bag A contains 5x coins. Bag B contains 3x coins. 8 coins are taken from Bag B and put into Bag A. The ratio of coins in Bag A to Bag B is now 11:5 Work out the total number of coins.
    Donagan
    Top Answerer
    At first A has 5x coins and B has 3x. After the transfer A has (5x+8) coins and B has (3x-8) coins. The new ratio is 11/5 = (5x + 8) / (3x - 8). Find x by cross-multiplying: (11)(3x - 8) = (5)(5x + 8). So 33x - 88 = 25x + 40. Then 8x = 128, and x = 16. So A started with 5x = 80 coins, and B started with 3x = 48 coins. The coin total is 80 + 48 = 128 coins. (After the transfer A had 88 coins and B had 40. 88:40 is in the ratio of 11:5.)
  • Question
    How can I write 4/5inch per 1 hour as ratio of number of inches to number of hour?
    Donagan
    Top Answerer
    You can write it just as you've written it, or write 0.8 inch per hour (or 0.8 : 1 if you don't want to use the units).
  • Question
    What is 600 centilitres as a ratio of 10 litres?
    Donagan
    Top Answerer
    600 centiliters = 6 liters, so 600 cl : 10 liters = 6 : 10 = 3 : 5.
  • Question
    What is the ratio of 156%?
    Donagan
    Top Answerer
    156% = 156 / 100 = 156 : 100 = 39 : 25.
  • Question
    A class has a ratio of girls to boys of 3/4. 4 girls and 6 boys leave the room. If the ratio of girls to boys left is 4/5 how many students are left in the class?
    Donagan
    Top Answerer
    Let x be the original number of boys. Then 3x/4 is the original number of girls. The new number of boys is x-6, and the new number of girls is [(3x/4) - 4]. We're told that the new ratio of girls to boys is 4/5 = [(3x/4) - 4] / (x - 6). Cross-multiply to solve for x: (4)(x - 6) = (5)[(3x/4) - 4]. Then 4x - 24 = (15x/4) - 20. Multiply both sides of that equation by 4 to get rid of the fraction: 16x - 96 = 15x - 80. Subtract 15x from both sides, and add 96 to both sides: x = 16. So originally there were 16 boys and (3/4)(16) = 12 girls. Now there are 16 - 6 = 10 boys and 12 - 4 = 8 girls. 8/10 = 4/5.
  • Question
    How do you express 5½ : 2½ as a ratio of whole numbers?
    Community Answer
    If you multiply each number by 2, you will eliminate the fractions without changing the value of the ratio. It becomes 11 : 5.
  • Question
    In a group the ratio of boys to girls is 5:4. There are 250 boys. How many girls are there?
    Community Answer
    Let x be the number of girls. Then 5/4 = 250/x. Cross multiply: 5x = (4)(250) = 1000. Divide both sides by 5: x = 200 girls.
  • Question
    How would you write 91% as a ratio?
    Community Answer
    91% = 91/100 = 91:100.
  • Question
    How do I change 180 into a fraction?
    Community Answer
    Since any number divided by 1 is the number, you can turn 180 into 180/1 to be this number expressed as a fraction.
  • Question
    How to do an equivalent ratio?
    Donagan
    Top Answerer
    To find an equivalent ratio, multiply or divide the numbers in the original ratio by any other number. For example, say the original ratio is 6:4. You could multiply that ratio by any number, such as 3, giving an equivalent ratio of 18:12. You could also divide the original ratio by any number, such as 2, giving another equivalent ratio of 3:2.
  • Question
    Can you help me with this problem: Michelle bought 4 gallons of grape juice and 5 gallons of apple juice for a party. What is the ratio of gallons of apple juice to gallons of grape juice she bought?
    Donagan
    Top Answerer
    The ratio is simply 5:4.
  • Question
    Php 120.00 for every USD 2?
    Donagan
    Top Answerer
    120 : 2 = 60 : 1.
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