Answer
117 cans of pipe joint are needed.
Work Step by Step
$156 \times \frac{3}{4}$ = $\frac{156}{1} \times \frac{3}{4}$
Reduce the fractions using the common factor of 4.
$\frac{39}{1} \times \frac{3}{1}$ = $\frac{117}{1}$ = 117
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