## Basic College Mathematics (10th Edition)

(a) $\frac{4}{5}$ or 80% or 0.8 (b) $\frac{1}{5}$ or 20% or 0.2
(a) Reduce $\frac{64}{80}$ by 16 to get $\frac{4}{5}$ $\frac{1}{5}$=0.2 so $\frac{4}{5}$=4$\times$0.2=0.8 0.8=80% (b) 1-$\frac{4}{5}$=$\frac{1}{5}$ 1-0.8=0.2 100%-80%=20%