Evaluate
\frac{X}{11}-\frac{2}{7}
Factor
\frac{7X-22}{77}
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\frac{7X}{77}-\frac{2\times 11}{77}
To add or subtract expressions, expand them to make their denominators the same. Least common multiple of 11 and 7 is 77. Multiply \frac{X}{11} times \frac{7}{7}. Multiply \frac{2}{7} times \frac{11}{11}.
\frac{7X-2\times 11}{77}
Since \frac{7X}{77} and \frac{2\times 11}{77} have the same denominator, subtract them by subtracting their numerators.
\frac{7X-22}{77}
Do the multiplications in 7X-2\times 11.
\frac{7X-22}{77}
Factor out \frac{1}{77}.
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