What percent of 80 is 4?
\(\displaystyle 4 \ is \ \frac{1}{20} \ of \ 80 \ [(4)(20) \ = \ 80] \ or \ 4 \ is \ .05 \ of \ 80, \ \bigg(\frac{1}{20}\bigg) \ = \ .05,\)
\(\displaystyle hence, \ 4 \ is \ 5\% \ of \ 80. \ Check: \ (5\%)(80) \ = \ (.05)(80) \ = \ 4.\)