Subtract 8/15 from 9/20
9/20 - 8/15 is -1/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
9/20 = 9 × 3/20 × 3 = 27/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
8/15 = 8 × 4/15 × 4 = 32/60 - Subtract the two like fractions:
27/60 - 32/60 = 27 - 32/60 = -5/60 - After reducing the fraction, the answer is -1/12
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