What is 5/1 of 3?

Often, in mathematics or everyday life, we need to find a fraction of a given number. For instance, how would you quickly calculate 5/1 of 3? We'll show you a straightforward method to achieve that.

How to calculate 5/1 of 3?

  1. Multiply the whole number by the numerator of the fraction: 3 × 5 = 15
  2. Divide this result by denominator of the fraction: 15/1 = 15

How does it work?

The principle behind finding a fraction of a number, such as 5/1 of 3, is rooted in the method of cross-multiplication.

Consider the following proportion: 5 1 = x 3 (where x represents 5/1 of 3)

  1. Using the cross-multiplication method, multiply both numerators by their opposite denominators: 5 × 3 = 1 x
  2. Which gives: 15 = 1 x
  3. Divide both sides by 1 to isolate x: 15 1 = 1 x 1
  4. Which gives the result: 15 1 = x

Thus, 5/1 of 3 is equal to 15/1 (or 15 in its decimal form).