Subtract 7/27 from 18/84
18/84 - 7/27 is -17/378.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 27 is 756
Next, find the equivalent fraction of both fractional numbers with denominator 756 - For the 1st fraction, since 84 × 9 = 756,
18/84 = 18 × 9/84 × 9 = 162/756 - Likewise, for the 2nd fraction, since 27 × 28 = 756,
7/27 = 7 × 28/27 × 28 = 196/756 - Subtract the two like fractions:
162/756 - 196/756 = 162 - 196/756 = -34/756 - After reducing the fraction, the answer is -17/378
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