Question

21 is 84% of what number?

Answer 1

21 is 84% of 25

Convert the percentage (84) into a decimal by dividing it over 100:
$\frac{84}{100} = 0.84$

Divide 21 over 0.84:
$\frac{21}{0.84} = 25$

Answer 2

21 = 84% * x

21 = 84/100 * x

21 = 42/50 * x

21 = 21/25 * x

x = 21 * 25/21

x = 25


21 is 84% of 25.