Subtract 20/56 from 15/63
15/63 - 20/56 is -5/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 56 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 63 × 8 = 504,
15/63 = 15 × 8/63 × 8 = 120/504 - Likewise, for the 2nd fraction, since 56 × 9 = 504,
20/56 = 20 × 9/56 × 9 = 180/504 - Subtract the two like fractions:
120/504 - 180/504 = 120 - 180/504 = -60/504 - After reducing the fraction, the answer is -5/42
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