Question

$18$ is what percent of $72$?

Answer 1

$25$%
Explanation:
For calculating a number $x$ as a percentage of another number $y$, one has to calculate $\frac{x\times 100}{y}$%.
As such, $18$ as a percentage of $72$ will be $\frac{18\times 100}{72}$% = $\frac{100}{4}=25$%.