What is 9/5 of 36?

Often, in mathematics or everyday life, we need to find a fraction of a given number. For instance, how would you quickly calculate 9/5 of 36? We'll show you a straightforward method to achieve that.

How to calculate 9/5 of 36?

  1. Multiply the whole number by the numerator of the fraction: 36 × 9 = 324
  2. Divide this result by denominator of the fraction: 324/5 = 64.8

Since 324/5 is an improper fraction, the result could also be expressed as a mixed number: 64 4/5

How does it work?

The principle behind finding a fraction of a number, such as 9/5 of 36, is rooted in the method of cross-multiplication.

Consider the following proportion: 9 5 = x 36 (where x represents 9/5 of 36)

  1. Using the cross-multiplication method, multiply both numerators by their opposite denominators: 9 × 36 = 5 x
  2. Which gives: 324 = 5 x
  3. Divide both sides by 5 to isolate x: 324 5 = 5 x 5
  4. Which gives the result: 324 5 = x

Thus, 9/5 of 36 is equal to 324/5 (or 64.8 in its decimal form).