Subtract 72/15 from 42/12
1st number: 3 6/12, 2nd number: 4 12/15
42/12 - 72/15 is -13/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
42/12 = 42 × 5/12 × 5 = 210/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
72/15 = 72 × 4/15 × 4 = 288/60 - Subtract the two like fractions:
210/60 - 288/60 = 210 - 288/60 = -78/60 - After reducing the fraction, the answer is -13/10
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