What is 1/7 of 89?

How to calculate 1/7 of 89?

1. Multiply the whole number by the numerator of the fraction: 89 × 1 = 89
2. Divide this result by denominator of the fraction: 89/7 = 12.714285714286

Since 89/7 is an improper fraction, the result could also be expressed as a mixed number: 12 5/7

How does it work?

The principle behind finding a fraction of a number, such as 1/7 of 89, is rooted in the method of cross-multiplication.

Consider the following proportion: $\frac{1}{7}=\frac{x}{89}$ (where x represents 1/7 of 89)

1. Using the cross-multiplication method, multiply both numerators by their opposite denominators: $1\times 89=7x$
2. Which gives: $89=7x$
3. Divide both sides by 7 to isolate x: $\frac{89}{7}=\frac{7x}{7}$
4. Which gives the result: $\frac{89}{7}=x$

Thus, 1/7 of 89 is equal to 89/7 (or 12.714285714286 in its decimal form).