Basic College Mathematics (9th Edition)

Published by Pearson
ISBN 10: 0321825535
ISBN 13: 978-0-32182-553-7

Chapter 2 - Multiplying and Dividing Fractions - Review Exercises - Page 190: 55

Answer

36 pull cords can be made.

Work Step by Step

$157 \frac{1}{2} \div 4 \frac{3}{8}$ cords can be made Estimate $158 \div 4 = 39 \frac{2}{4} = 39 \frac{1}{2}$ Solve $157 \frac{1}{2} \div 4 \frac{3}{8}$ Convert to improper fractions $\frac{315}{2} \div \frac{35}{8}$ Multiply by reciprocacl of divisor $\frac{315}{2} \times \frac{8}{35}$ Reduce by common factors of 2 and 35 then multiply. $\frac{9}{1} \times \frac{4}{1}$ = 36 36 pull cords can be made. Check $36 \times 4 \frac{3}{8}$ = $36 \times \frac{35}{8}$ = $\frac{1260}{8}$ = $157 \frac{1}{2}$
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