Prealgebra (7th Edition)

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.