# What percent of 84 is 21?

Sep 29, 2016

25%

#### Explanation:

Do

(100%)/(x%)=84/21

Solve for $x$

$\left(\frac{100}{x}\right) \times x = \left(\frac{84}{21}\right) \times x \text{ }$ [multiply both sides of the equation by $x$]

$100 = 4 x \text{ }$ [divide both sides of the equation by $4$ to get $x$]

$\frac{100}{4} = \frac{4 x}{4}$

$25 = x$