What is 8/1 of 18?

Often, in mathematics or everyday life, we need to find a fraction of a given number. For instance, how would you quickly calculate 8/1 of 18? We'll show you a straightforward method to achieve that.

How to calculate 8/1 of 18?

  1. Multiply the whole number by the numerator of the fraction: 18 × 8 = 144
  2. Divide this result by denominator of the fraction: 144/1 = 144

How does it work?

The principle behind finding a fraction of a number, such as 8/1 of 18, is rooted in the method of cross-multiplication.

Consider the following proportion: 8 1 = x 18 (where x represents 8/1 of 18)

  1. Using the cross-multiplication method, multiply both numerators by their opposite denominators: 8 × 18 = 1 x
  2. Which gives: 144 = 1 x
  3. Divide both sides by 1 to isolate x: 144 1 = 1 x 1
  4. Which gives the result: 144 1 = x

Thus, 8/1 of 18 is equal to 144/1 (or 144 in its decimal form).