Danny worked 40 hours and earned \(\$6.30\) per hour. His friend Erica earn \(\$8.40\) per hour at her job. How many hours would Erica have to work in order to equal Danny’s earnings for 40 hours?
Danny earned a total of \(40 \times \$6.30 = \$252\). To ﬁnd the number of hours Erica would take to earn \(\$252\) , divide \(\$252\) by \(\$8.40\).