Answer
1
Work Step by Step
$\frac{12y}{21}$$\div$$\frac{4y}{7}$= $\frac{12y}{21}$$\times$$\frac{7}{4y}$=
=$\frac{12y\times7}{21\times4y}$=
=$\frac{4y\times 3\times7}{7\times3\times4y}$=
=$\frac{1^{}}{1}$ =1
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