## Basic College Mathematics (10th Edition)

Use front end rounding to estimate the number of supermarkets in NY. $2202 \approx 2000$ Multiply by $\frac{4}{5}$ to find the number that are in medium to large population areas. $2000 \times \frac{4}{5}$ = $\frac{2000}{1} \times \frac{4}{5}$ = $\frac{8000}{5}$ = $\frac{8000 \div 5}{5 \div 5}$ = $\frac{1600}{1}$ = 1600 To find the exact number that are in medium to large population areas multiply the exact number of NY supermarkets by $\frac{4}{5}$. $2202 \times \frac{4}{5}$ = $\frac{2202}{1} \times \frac{4}{5}$ = $\frac{8808}{5}$ = $\frac{8808 \div 5}{5 \div 5}$ = $\frac{1761R3}{1}$ = $1761 \frac{3}{5}$ $\approx 1762$