What is 3/1 of 4?

Often, in mathematics or everyday life, we need to find a fraction of a given number. For instance, how would you quickly calculate 3/1 of 4? We'll show you a straightforward method to achieve that.

How to calculate 3/1 of 4?

  1. Multiply the whole number by the numerator of the fraction: 4 × 3 = 12
  2. Divide this result by denominator of the fraction: 12/1 = 12

How does it work?

The principle behind finding a fraction of a number, such as 3/1 of 4, is rooted in the method of cross-multiplication.

Consider the following proportion: 3 1 = x 4 (where x represents 3/1 of 4)

  1. Using the cross-multiplication method, multiply both numerators by their opposite denominators: 3 × 4 = 1 x
  2. Which gives: 12 = 1 x
  3. Divide both sides by 1 to isolate x: 12 1 = 1 x 1
  4. Which gives the result: 12 1 = x

Thus, 3/1 of 4 is equal to 12/1 (or 12 in its decimal form).