Evaluate
-\frac{a}{12}+252
Factor
\frac{3024-a}{12}
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\frac{252\times 12}{12}-\frac{a}{12}
To add or subtract expressions, expand them to make their denominators the same. Multiply 252 times \frac{12}{12}.
\frac{252\times 12-a}{12}
Since \frac{252\times 12}{12} and \frac{a}{12} have the same denominator, subtract them by subtracting their numerators.
\frac{3024-a}{12}
Do the multiplications in 252\times 12-a.
\frac{3024-a}{12}
Factor out \frac{1}{12}.
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