CPM Homework Help : CC2MN Problem 4-155

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4-155.

Simplify each expression.

$\frac { 12 } { 5 } \div \frac { 7 } { 10 }$
Step 1(a):
Dividing by a fraction is the same as multiplying by its reciprocal.
$\frac{12}{5}\left(\frac{10}{7}\right)$
Step 2(a):
Canceling earlier is easier than reducing later.
$\frac{12}{1}\left(\frac{2}{7}\right)$
Answer (a):
$\frac{24}{7}$

$\frac{9}{4}\div\left(-\frac{1}{3}\right)$
Hint (b):
See the help for part (a).
Answer (b):
$-\frac{27}{4}$

$-\frac{3}{5}\div\left(-\frac{1}{6}\right)$
Hint (c):
See the help for part (a).

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