What is 2/10 of 51?

How to calculate 2/10 of 51?

1. Multiply the whole number by the numerator of the fraction: 51 × 2 = 102
2. Divide this result by denominator of the fraction: 102/10 = 10.2
3. Simplify by dividing both the numerator and denominator by their GCD (2):
   • 102/2 = 51
   • 10/2 = 5
4. Which gives: 51/5

Since 51/5 is an improper fraction, the result could also be expressed as a mixed number: 10 1/5

How does it work?

The principle behind finding a fraction of a number, such as 2/10 of 51, is rooted in the method of cross-multiplication.

Consider the following proportion: $\frac{2}{10}=\frac{x}{51}$ (where x represents 2/10 of 51)

1. Using the cross-multiplication method, multiply both numerators by their opposite denominators: $2\times 51=10x$
2. Which gives: $102=10x$
3. Divide both sides by 10 to isolate x: $\frac{102}{10}=\frac{10x}{10}$
4. Which gives the result: $\frac{102}{10}=x$ (or $\frac{51}{5}=x$)

Thus, 2/10 of 51 is equal to 51/5 (or 10.2 in its decimal form).