Subtract 20/72 from 6/63
6/63 - 20/72 is -23/126.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 63 × 8 = 504,
6/63 = 6 × 8/63 × 8 = 48/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
20/72 = 20 × 7/72 × 7 = 140/504 - Subtract the two like fractions:
48/504 - 140/504 = 48 - 140/504 = -92/504 - After reducing the fraction, the answer is -23/126
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