Question

One fifth of a number is at most 30

Answer 1

One fifth of a number is at most 30.
$\sf\frac{1}{5}x \leq 30\\Multiply\ by\ 5\ on\ both\ sides.\\x \leq 30\times5\\x \leq 150$

Answer 2

1/5x < = 30
x < = 30 * 5
x < = 150