What is 8/7 of 65?

Often, in mathematics or everyday life, we need to find a fraction of a given number. For instance, how would you quickly calculate 8/7 of 65? We'll show you a straightforward method to achieve that.

How to calculate 8/7 of 65?

  1. Multiply the whole number by the numerator of the fraction: 65 × 8 = 520
  2. Divide this result by denominator of the fraction: 520/7 = 74.285714285714

Since 520/7 is an improper fraction, the result could also be expressed as a mixed number: 74 2/7

How does it work?

The principle behind finding a fraction of a number, such as 8/7 of 65, is rooted in the method of cross-multiplication.

Consider the following proportion: 8 7 = x 65 (where x represents 8/7 of 65)

  1. Using the cross-multiplication method, multiply both numerators by their opposite denominators: 8 × 65 = 7 x
  2. Which gives: 520 = 7 x
  3. Divide both sides by 7 to isolate x: 520 7 = 7 x 7
  4. Which gives the result: 520 7 = x

Thus, 8/7 of 65 is equal to 520/7 (or 74.285714285714 in its decimal form).