Subtract 20/40 from 15/56
15/56 - 20/40 is -13/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 56 × 5 = 280,
15/56 = 15 × 5/56 × 5 = 75/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
20/40 = 20 × 7/40 × 7 = 140/280 - Subtract the two like fractions:
75/280 - 140/280 = 75 - 140/280 = -65/280 - After reducing the fraction, the answer is -13/56
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