Q&A for How to Work Out a Fraction of an Amount

This problem is essentially asking, "What is 2/7 of 9 1/4?" So, you will multiply the two fractions to get your answer. For instructions on how to multiply two fractions, you can read the following article:http://www.wikihow.com/Multiply-Mixed-Numbers

You can set up the equation like this: 9x = 6x + 4y, where x = the weight of a truck, and y = the weight of a sedan. Since they want to know what fraction of a truck's weight (x) equals the weight of a sedan (y), you need to solve for y. 9x = 6x + 4y 3x = 4y 3/4x = y. So, the weight of a sedan is 3/4 the weight of a truck.

3 quarters is the same as 3/4. So this is a multiplication problem: 3/4 x 40 = 3/4 x 40/1 = 120/4 = 30

The inclination is probably to multiply 20 by 1/3, because if 1/3 of the animals are chickens, then 1/3 of the legs must be chicken legs. This doesn't work, however, because chickens and cows have a different number of legs. So you can't solve this problem simply by multiplying the fraction and the whole number. The easiest way to solve this problem is to think about it logically. For every 1 chicken in the barn, there are 2 cows. That means, for every 2 chicken legs, there are 8 cow legs. So you can set up a table, and keep track of the legs until you get to 20 legs: 1 chicken/2 cows = 2 legs/8 legs = 10 legs 2 chickens/4 cows = 4 legs/16 legs = 20 legs. So there are 2 chickens and 4 cows.

For complete instructions on how to add fractions, you can read the following article: http://www.wikihow.com/Add-Fractions

You need to set up an algebraic equation. Let the missing number be x. The question is stating, "2/5 of what number = 16?" So your equation will be (2/5)x = 16. So to get the answer, you need to divide 16 by 2/5. (For complete instructions on how to divide by a fraction, you can read the following article: http://www.wikihow.com/Divide-Fractions-by-Fractions) 16 divided by 2/5 = 40.

The question is essentially asking, "What is 3/4 of 12?" So you will multiply the fraction and the whole number: 3/4 x 12/1 = 36/4 = 9.

Divide 2 by 3/5.

Calculate 168 - 6 = 162. Place this difference over the original number to make a fraction: 162/168. Then you need to reduce your fraction by finding the greatest factor common to the numerator and the denominator. (For complete instructions on how to reduce a fraction, read the following article: http://www.wikihow.com/Reduce-Fractions.) The greatest common factor is 6. So when you divide the numerator and the denominator by 6, you get the fraction 27/28.

It means that Tom's salary is four times larger than Jane's.

Multiply 18.5 by 0.2.

If each big fish is able to eat two small fish, that means there were twice as many little fish as big fish to begin with. Let x equal the number of big fish. Then (x + 2x) = 3x = 12. So x = 4.

For complete instructions on how to subtract fractions, you can read the following article: http://www.wikihow.com/Subtract-Fractions

You can turn the percentage into a fraction and then multiply. "Two percent" means "two hundreds," so the fraction is 2/100. So you would multiply 2/100 (or 1/50) times the amount.

"2 out of 40" indicates that 2 is the numerator, and 40 is the denominator. So the fraction is 2/40, which simplifies to 1/20.

For complete instructions on how to compare fractions, you can read the following article: http://www.wikihow.com/Compare-Fractions

For this problem you need to create a fraction and reduce it. The phrase "fraction of x" tells you that your denominator is 369,400. So your fraction is 331,560/368,400. From here you need to reduce the fraction by finding the greatest factor common to the numerator and denominator. (For complete instructions on how to reduce a fraction, you can read the following article: http://www.wikihow.com/Reduce-Fractions) This greatest common factor is 36,840. So, dividing the numerator and denominator by this factor, you get the fraction 9/10.

First you need to find the difference when you remove the two items. Then find the percentage left by dividing the amount left over by 8.

You need to set up a an equation using the variable x for the missing number. "Of" means to multiply, so the equation will look like this: (1/5)40 = (2/5)x 8 = (2/5)x 20 = x

Convert 3/8% to a decimal, and multiply it by 800. 3/8% means 3/8 of 1% or (3/8)(1%) or (3/8)(.01). That's (0.375)(.01) = 0.00375. So multiply 800 by 0.00375. That equals 3. So 3/8% of 800 is 3. (Another way to think of this is: 1% of 800 is 8. 3/8% is 3/8 of 1%, and 3/8 of 8 is 3.)

First find out how many thirds that is: 14 1/3 = [(14 x 3) + 1] thirds, or 43 thirds, which is (2 x 43) or 86 sixths.

One slice is 1/12 of the guava.

Your total money is (270)(9/2) = 1215. 3/4 of 1215 is 911.25.

¼ of 20 is 5. 14 + 5 - 7 = 12.

Divide the numerator by the denominator. Multiply that number by 100, and place a percent sign to the right of the product. For example, to convert ¾ to a percentage, divide 3 by 4. That's 0.75. Multiply by 100 and add the percent sign: 75%. It works for improper fractions, too. Convert 12/10 to a percentage: 12 divided by 10 is 1.2. Multiply by 100 and add the sign: 120%.

Let's assume that she ate 50% of the cake and then ate ¾ of the other half. ¾ of a half is (¾)(½) = 3/8. The first half was 4/8. 4/8 + 3/8 = 7/8.

If all four components carry an equal weight, add the four numbers together, and divide by 4. (82 + 91 + 78 + 81) / 4 = 83. Looks like a B. It's more complicated if all four components do not carry the same weight.

Multiply 234 by 5/7. In other words, multiply 234 by 5 and then divide the product by 7.