Subtract 20/36 from 8/28
8/28 - 20/36 is -17/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 28 × 9 = 252,
8/28 = 8 × 9/28 × 9 = 72/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
20/36 = 20 × 7/36 × 7 = 140/252 - Subtract the two like fractions:
72/252 - 140/252 = 72 - 140/252 = -68/252 - After reducing the fraction, the answer is -17/63
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