Q&A for How to Calculate Fractions

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  • Question
    What is 5/8 times 16?
    Donagan
    Top Answerer
    To multiply a fraction by a whole number, multiply the numerator by the whole number to get the new numerator. The denominator remains unchanged. (5/8)(16) = 80/8 = 10.
  • Question
    How do I calculate 2/3 × -5/6?
    Donagan
    Top Answerer
    (2/3)(-5/6) = [(2)(-5)] / [(3)(6)] = -10/18 = -5/9.
  • Question
    How do I calculate 13/14 x 4/5?
    Community Answer
    Multiply the numerators together to get the new numerator, and multiply the denominators together to get the new denominator. (13/14)(4/5) = 52/70 = 26/35.
  • Question
    How much is 5/8 + 7/8?
    Community Answer
    5/8 + 7/8 = 12/8 = 1 4/8 = 1 1/2.
  • Question
    What two fractions are equivalent to 2/5?
    I_l1ke_gam3s
    Community Answer
    If you struggle with finding equivalent fractions, you should probably read this article: How to Find Equivalent Fractions .
  • Question
    How can I calculate questions that have mixed fractions?
    I_l1ke_gam3s
    Community Answer
    Convert mixed fractions to improper fractions if necessary by looking at wikiHow's article on it.
  • Question
    Can you simplify a fraction before multiplying?
    Community Answer
    Yes. That will make the numbers a little easier to work with.
  • Question
    How do I calculate negative 4 plus 13 / 8?
    I_l1ke_gam3s
    Community Answer
    -4 + 13/8 = -32/8 + 13/8 = -19/8 = -2 3/8.
  • Question
    What is 4/10 subtracted from 24/100?
    Community Answer
    24/100 - 4/10 = 24/100 - 40/100 = -16/100.
  • Question
    How do I calculate this: 3 5/12 - 1 3/4?
    Community Answer
    3 5/12 - 1 3/4 = 41/12 - 7/4 = 41/12 - 21/12 = 20/12 = 1 8/12 = 1 2/3.
  • Question
    How do I calculate this: 3 5/12 - 1 3/4?
    Community Answer
    3 5/12 = 1 3/4 = 41/12 - 7/4 = 41/12 - 21/12 = 20/12 = 1 8/12 = 1 2/3.
  • Question
    3/4 with a denominator of 28
    Community Answer
    If you want to divide 3/4 by 28, leave the 3 alone and multiply the 4 by 28. The answer is 3 / [(4)(28)] = 3 / 112.
  • Question
    How do I calculate (1/-100) - (1/-25)?
    Community Answer
    (1/-100) - (1/-25) = (-1/100) - (-1/25) = (-1/100) + (1/25) = (-1/100) + 4/100) = 3/100. 1/2500.
  • Question
    What is 8 4/9 + 6 3/4?
    I_l1ke_gam3s
    Community Answer
    8 4/9 + 6 3/4 = 8 16/36 + 6 27/36 = 14 43/36 = 15 7/36.
  • Question
    What is 2/3 of 45,000?
    Community Answer
    (2/3)(45,000) = 90,000 / 3 = 30,000.
  • Question
    Please explain further for me on adding fractions with different denominators.
    Community Answer
  • Question
    Does 8/10 = 0.8 or 0.08?
    Community Answer
    8/10 and 0.8 are two ways of writing the same thing: eight-tenths.
  • Question
    What is the fraction in a four box, and two is shaded?
    Community Answer
    If it's a box with four parts, and two parts are shaded, that means that 2/4 or 1/2 are shaded.
  • Question
    What happens when you multiply and and add at the same time? Do we follow the PEMDAS rules? What is 4/3 x 7/4 + 4/5 ?
    Community Answer
    Yes, PEMDAS always applies. So in this case, multiply first and then add. (4/3)(7/4) = 28/12 = 7/3. 7/3 + 4/5 = 35/15 + 12/15 = 47/15 = 3 2/15.
  • Question
    What are fractions really about?
    Community Answer
    Fractions are designated parts of a whole number.
  • Question
    What is the probability of something if the number is 8 and the total is 18?
    I_l1ke_gam3s
    Community Answer
    If you need help, see further details on this wikiHow article: How to Calculate Probability .
  • Question
    I have a total of 47 cows. What is 1/3 of that?
    Community Answer
    Multiply 47 by 1/3. That's 47/3, or 15 2/3. In terms of actual animals, that would be either 15 or 16 cows.
  • Question
    How do I turn an improper fraction into a proper fraction?
    I_l1ke_gam3s
    Community Answer
    You can’t make an improper fraction a proper fraction because that is already more than a proper fraction. All you can do is turn it into a mixed number or if it’s not simplified, simplify it to its lowest terms.
  • Question
    How do I work out 1 divided by 4 multiplied by 32?
    I_l1ke_gam3s
    Community Answer
    1/4 is just 1/4. If you multiply by 1/4, that’s saying you’re dividing by the reciprocal. 32/4 is the same thing as 32 x 1/4. Your answer is 8.
  • Question
    How do you calculate 2/7 ÷ 20\28?
    Community Answer
    Let's assume the problem is (2/7) ÷ (20/28). First reduce 20/28 to 5/7. You could then solve the problem by inspection if you recognize that 2/7 divided by 5/7 is simply 2/5. However, to solve by the regular method, (2/7) ÷ (5/7) = (2/7)(7/5) = 14/35 = 2/5.
  • Question
    How do you know if a fraction is greater than or less than another fraction?
    Community Answer
    Convert one or both fractions so that they both have the same denominator. Then the fraction with the greater numerator is the greater fraction. For example, if you're comparing 2/3 and 3/4, convert them to 8/12 and 9/12, respectively. Because 9/12 is greater than 8/12, 3/4 is greater than 2/3.
  • Question
    How do you rearrange these fractions from largest to smallest: 6/12, 3/4, 5/8, 1/16?
    Community Answer
    First find the lowest common denominator. Because 12 is a multiple of 4 and 16 is a multiple of 8, you can find the LCD by multiplying 12 by 16 (and then perhaps reducing). (12)(16) = 192. That is a common denominator but not the lowest common denominator. If you divide by 192 by 2, you get 96, which is the lowest common denominator. So the fractions convert to 48/96, 72/96, 60/96 and 6/96, respectively. Arranged from largest to smallest, they are 72/96, 60/96, 48/96 and 6/96. So the rearranged original fractions are 3/4, 5/8, 6/12 and 1/16.
  • Question
    How do you calculate 14/13 - 13/15?
    Community Answer
    Find the common denominator. Then subtract the second numerator from the first, and keep the common denominator.
  • Question
    How do you add 2 1/2 + 7/10+ 1 1/4?
    Community Answer
    2 1/2 + 7/10 + 1 1/4 = 5/2 + 7/10 + 5/4 = 50/20 + 14/20 + 25/20 = 89/20 = 4 9/20.
  • Question
    How do I calculate 1/5 - 1/4 = 7/15?
    Community Answer
    You don't. 1/5 - 1/4 = 4/20 - 5/20 = -1/20.
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