Subtract 28/56 from 7/15
7/15 - 28/56 is -1/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 56 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 15 × 56 = 840,
7/15 = 7 × 56/15 × 56 = 392/840 - Likewise, for the 2nd fraction, since 56 × 15 = 840,
28/56 = 28 × 15/56 × 15 = 420/840 - Subtract the two like fractions:
392/840 - 420/840 = 392 - 420/840 = -28/840 - After reducing the fraction, the answer is -1/30
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