What is 3/7 of 27?

How to calculate 3/7 of 27?

1. Multiply the whole number by the numerator of the fraction: 27 × 3 = 81
2. Divide this result by denominator of the fraction: 81/7 = 11.571428571429

Since 81/7 is an improper fraction, the result could also be expressed as a mixed number: 11 4/7

How does it work?

The principle behind finding a fraction of a number, such as 3/7 of 27, is rooted in the method of cross-multiplication.

Consider the following proportion: $\frac{3}{7}=\frac{x}{27}$ (where x represents 3/7 of 27)

1. Using the cross-multiplication method, multiply both numerators by their opposite denominators: $3\times 27=7x$
2. Which gives: $81=7x$
3. Divide both sides by 7 to isolate x: $\frac{81}{7}=\frac{7x}{7}$
4. Which gives the result: $\frac{81}{7}=x$

Thus, 3/7 of 27 is equal to 81/7 (or 11.571428571429 in its decimal form).