Solve for k
k=\frac{9}{20}=0.45
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\frac{63}{140}=k
Divide both sides by 140.
\frac{9}{20}=k
Reduce the fraction \frac{63}{140} to lowest terms by extracting and canceling out 7.
k=\frac{9}{20}
Swap sides so that all variable terms are on the left hand side.
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