Subtract 49/56 from 15/40
15/40 - 49/56 is -1/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 56 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
15/40 = 15 × 7/40 × 7 = 105/280 - Likewise, for the 2nd fraction, since 56 × 5 = 280,
49/56 = 49 × 5/56 × 5 = 245/280 - Subtract the two like fractions:
105/280 - 245/280 = 105 - 245/280 = -140/280 - After reducing the fraction, the answer is -1/2
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