Evaluate
-\frac{a}{1200}+\frac{1}{20}
Expand
-\frac{a}{1200}+\frac{1}{20}
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\frac{60-a}{60\times 20}
Express \frac{\frac{60-a}{60}}{20} as a single fraction.
\frac{60-a}{1200}
Multiply 60 and 20 to get 1200.
\frac{60-a}{60\times 20}
Express \frac{\frac{60-a}{60}}{20} as a single fraction.
\frac{60-a}{1200}
Multiply 60 and 20 to get 1200.
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