Basic College Mathematics (10th Edition)

$140 \div 1 \frac{1}{4}$ Estimate Round fractions to nearest whole number. $140 \div 1$ = 140 trips Exact Convert mixed numbers to improper fractions. $\frac{140}{1} \div \frac{5}{4}$ Multiply by the reciprocal of the divisor. $\frac{140}{1} \times \frac{4}{5}$ Reduce by the common factor of 5. $\frac{28}{1} \times \frac{4}{1}$ = $28 \times 4$ = 112 trips