Subtract 42/20 from 8/15
1st number: 8/15, 2nd number: 2 2/20
8/15 - 42/20 is -47/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
8/15 = 8 × 4/15 × 4 = 32/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
42/20 = 42 × 3/20 × 3 = 126/60 - Subtract the two like fractions:
32/60 - 126/60 = 32 - 126/60 = -94/60 - After reducing the fraction, the answer is -47/30
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