#### Answer

308

#### Work Step by Step

15.4 is 5 % of what number ?
5 is percent
what number is base
15.4 is amount
$\frac{15.4}{b}$=$\frac{5}{100}$ set cross product equal
5$\times$ b = 15.4 $\times$ 100 Multiply
5b= 1540 divide both sides by 5
$\frac{5b}{5}$ = $\frac{1540}{5}$
b= 308
52 is 65 % of 80.