Q&A for How to Calculate Fractions

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What is 5/8 times 16?

Donagan

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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.

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Question

How do I calculate 2/3 × -5/6?

Donagan

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(2/3)(-5/6) = [(2)(-5)] / [(3)(6)] = -10/18 = -5/9.

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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 .

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What is 1/3 of $1586.36?

Community Answer

$1586.36 ÷ 3 = $528.79.

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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.

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Can you simplify a fraction before multiplying?

Community Answer

Yes. That will make the numbers a little easier to work with.

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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.

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What is 4/10 subtracted from 24/100?

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24/100 - 4/10 = 24/100 - 40/100 = -16/100.

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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.

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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.

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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.

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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.

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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.

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What is 2/3 of 45,000?

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(2/3)(45,000) = 90,000 / 3 = 30,000.

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Please explain further for me on adding fractions with different denominators.

Community Answer

See Add Fractions With Unlike Denominators .

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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.

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How much is 5/8 + 7/8?

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5/8 + 7/8 = 12/8 = 1 4/8 = 1 1/2.

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Question

How do l calculate 9 - 5/7?

I_l1ke_gam3s

Community Answer

9 - 5/7 = 63/7 - 5/7 = 58/7 = 8 2/7.

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Question

What is one half of 65/128?

Community Answer

When the numerator is an odd number, just double the denominator (and reduce the resulting fraction if necessary). So half of 65/128 is 65/256.

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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.

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Question

How do I calculate this fraction: 8/5 * 8/5 - 9/5?

I_l1ke_gam3s

Community Answer

8/5 x 8/5 = 64/25. Convert 9/5 to 45/25. Then 64/25 - 45/25 = 19/25. Your answer is 19/25.

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Question

How do you convert a mixed number into an improper fraction?

Community Answer

Multiply the denominator by the whole number, then add that result to the numerator of the fraction to get the final numerator. The final denominator is the same as the denominator in the fraction of the mixed number.

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Question

How do I calculate 1/2 is equal to?/8

Community Answer

Let 1/2 = x/8. Solve for x by cross-multiplying: (1)(8) = (x)(2). Divide both sides of the equation by 2, and x = 4. So 1/2 = 4/8.

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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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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.

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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.

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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.

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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.

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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.

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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.

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