What is 5/5 of 89?

Often, in mathematics or everyday life, we need to find a fraction of a given number. For instance, how would you quickly calculate 5/5 of 89? We'll show you a straightforward method to achieve that.

How to calculate 5/5 of 89?

  1. Multiply the whole number by the numerator of the fraction: 89 × 5 = 445
  2. Divide this result by denominator of the fraction: 445/5 = 89
  3. Simplify by dividing both the numerator and denominator by their GCD (5):
    • 445/5 = 89
    • 5/5 = 1
  4. Which gives: 89/1

How does it work?

The principle behind finding a fraction of a number, such as 5/5 of 89, is rooted in the method of cross-multiplication.

Consider the following proportion: 5 5 = x 89 (where x represents 5/5 of 89)

  1. Using the cross-multiplication method, multiply both numerators by their opposite denominators: 5 × 89 = 5 x
  2. Which gives: 445 = 5 x
  3. Divide both sides by 5 to isolate x: 445 5 = 5 x 5
  4. Which gives the result: 445 5 = x (or 89 1 = x )

Thus, 5/5 of 89 is equal to 89/1 (or 89 in its decimal form).