What is 1/7 of 51?

How to calculate 1/7 of 51?

1. Multiply the whole number by the numerator of the fraction: 51 × 1 = 51
2. Divide this result by denominator of the fraction: 51/7 = 7.2857142857143

Since 51/7 is an improper fraction, the result could also be expressed as a mixed number: 7 2/7

How does it work?

The principle behind finding a fraction of a number, such as 1/7 of 51, is rooted in the method of cross-multiplication.

Consider the following proportion: $\frac{1}{7}=\frac{x}{51}$ (where x represents 1/7 of 51)

1. Using the cross-multiplication method, multiply both numerators by their opposite denominators: $1\times 51=7x$
2. Which gives: $51=7x$
3. Divide both sides by 7 to isolate x: $\frac{51}{7}=\frac{7x}{7}$
4. Which gives the result: $\frac{51}{7}=x$

Thus, 1/7 of 51 is equal to 51/7 (or 7.2857142857143 in its decimal form).