Subtract 15/56 from 18/84
18/84 - 15/56 is -3/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 56 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 84 × 2 = 168,
18/84 = 18 × 2/84 × 2 = 36/168 - Likewise, for the 2nd fraction, since 56 × 3 = 168,
15/56 = 15 × 3/56 × 3 = 45/168 - Subtract the two like fractions:
36/168 - 45/168 = 36 - 45/168 = -9/168 - After reducing the fraction, the answer is -3/56
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