What is 8/9 of 79?

Often, in mathematics or everyday life, we need to find a fraction of a given number. For instance, how would you quickly calculate 8/9 of 79? We'll show you a straightforward method to achieve that.

How to calculate 8/9 of 79?

  1. Multiply the whole number by the numerator of the fraction: 79 × 8 = 632
  2. Divide this result by denominator of the fraction: 632/9 = 70.222222222222

Since 632/9 is an improper fraction, the result could also be expressed as a mixed number: 70 2/9

How does it work?

The principle behind finding a fraction of a number, such as 8/9 of 79, is rooted in the method of cross-multiplication.

Consider the following proportion: 8 9 = x 79 (where x represents 8/9 of 79)

  1. Using the cross-multiplication method, multiply both numerators by their opposite denominators: 8 × 79 = 9 x
  2. Which gives: 632 = 9 x
  3. Divide both sides by 9 to isolate x: 632 9 = 9 x 9
  4. Which gives the result: 632 9 = x

Thus, 8/9 of 79 is equal to 632/9 (or 70.222222222222 in its decimal form).