Subtract 42/20 from 7/15
1st number: 7/15, 2nd number: 2 2/20
7/15 - 42/20 is -49/30.
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,
7/15 = 7 × 4/15 × 4 = 28/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
42/20 = 42 × 3/20 × 3 = 126/60 - Subtract the two like fractions:
28/60 - 126/60 = 28 - 126/60 = -98/60 - After reducing the fraction, the answer is -49/30
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