What is 1/7 of 40?

How to calculate 1/7 of 40?

1. Multiply the whole number by the numerator of the fraction: 40 × 1 = 40
2. Divide this result by denominator of the fraction: 40/7 = 5.7142857142857

Since 40/7 is an improper fraction, the result could also be expressed as a mixed number: 5 5/7

How does it work?

The principle behind finding a fraction of a number, such as 1/7 of 40, is rooted in the method of cross-multiplication.

Consider the following proportion: $\frac{1}{7}=\frac{x}{40}$ (where x represents 1/7 of 40)

1. Using the cross-multiplication method, multiply both numerators by their opposite denominators: $1\times 40=7x$
2. Which gives: $40=7x$
3. Divide both sides by 7 to isolate x: $\frac{40}{7}=\frac{7x}{7}$
4. Which gives the result: $\frac{40}{7}=x$

Thus, 1/7 of 40 is equal to 40/7 (or 5.7142857142857 in its decimal form).