What is 5/6 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 5/6 of 3? We'll show you a straightforward method to achieve that.

How to calculate 5/6 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: 15/6 = 2.5
  3. Simplify by dividing both the numerator and denominator by their GCD (3):
    • 15/3 = 5
    • 6/3 = 2
  4. Which gives: 5/2

Since 5/2 is an improper fraction, the result could also be expressed as a mixed number: 2 1/2

How does it work?

The principle behind finding a fraction of a number, such as 5/6 of 3, is rooted in the method of cross-multiplication.

Consider the following proportion: 5 6 = x 3 (where x represents 5/6 of 3)

  1. Using the cross-multiplication method, multiply both numerators by their opposite denominators: 5 × 3 = 6 x
  2. Which gives: 15 = 6 x
  3. Divide both sides by 6 to isolate x: 15 6 = 6 x 6
  4. Which gives the result: 15 6 = x (or 5 2 = x )

Thus, 5/6 of 3 is equal to 5/2 (or 2.5 in its decimal form).