Evaluate
\frac{r-15}{2}
Factor
\frac{r-15}{2}
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r\times \frac{1}{2}-\frac{30}{4}
Reduce the fraction \frac{2}{4} to lowest terms by extracting and canceling out 2.
r\times \frac{1}{2}-\frac{15}{2}
Reduce the fraction \frac{30}{4} to lowest terms by extracting and canceling out 2.
\frac{r-15}{2}
Factor out \frac{1}{2}.
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