Basic College Mathematics (10th Edition)

$\frac{100 points}{48 minutes}$ = $\frac{100\div48 points}{48\div48 minutes}$ = $\frac{2.1 points}{1 minute}$ = 2.1 points/minute $\frac{48minutes}{100 points}$ = $\frac{48\div100minutes}{100\div100 points}$ = $\frac{0.48minutes}{1 point}$ = 0.48 minutes/point