# 21 is what percent of 50?

Nov 30, 2016

21 is 42% of 50.

#### Explanation:

"Percent" or "%" means "out of 100" or "per 100",

So we can say $\frac{21}{50} = \frac{x}{100}$

Solving for $x$ gives:

$100 \cdot \frac{21}{50} = 100 \cdot \frac{x}{100}$

$2 \cdot 21 = \cancel{100} \cdot \frac{x}{\cancel{100}}$

$x = 42$