Evaluate
-\frac{w}{7}+\frac{17}{110}
Factor
\frac{119-110w}{770}
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\frac{17\times 7}{770}-\frac{110w}{770}
To add or subtract expressions, expand them to make their denominators the same. Least common multiple of 110 and 7 is 770. Multiply \frac{17}{110} times \frac{7}{7}. Multiply \frac{w}{7} times \frac{110}{110}.
\frac{17\times 7-110w}{770}
Since \frac{17\times 7}{770} and \frac{110w}{770} have the same denominator, subtract them by subtracting their numerators.
\frac{119-110w}{770}
Do the multiplications in 17\times 7-110w.
\frac{119-110w}{770}
Factor out \frac{1}{770}.
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