What is 2/7 of 78?

How to calculate 2/7 of 78?

1. Multiply the whole number by the numerator of the fraction: 78 × 2 = 156
2. Divide this result by denominator of the fraction: 156/7 = 22.285714285714

Since 156/7 is an improper fraction, the result could also be expressed as a mixed number: 22 2/7

How does it work?

The principle behind finding a fraction of a number, such as 2/7 of 78, is rooted in the method of cross-multiplication.

Consider the following proportion: $\frac{2}{7}=\frac{x}{78}$ (where x represents 2/7 of 78)

1. Using the cross-multiplication method, multiply both numerators by their opposite denominators: $2\times 78=7x$
2. Which gives: $156=7x$
3. Divide both sides by 7 to isolate x: $\frac{156}{7}=\frac{7x}{7}$
4. Which gives the result: $\frac{156}{7}=x$

Thus, 2/7 of 78 is equal to 156/7 (or 22.285714285714 in its decimal form).