Subtract 42/30 from 15/12
1st number: 1 3/12, 2nd number: 1 12/30
15/12 - 42/30 is -3/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 30 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
15/12 = 15 × 5/12 × 5 = 75/60 - Likewise, for the 2nd fraction, since 30 × 2 = 60,
42/30 = 42 × 2/30 × 2 = 84/60 - Subtract the two like fractions:
75/60 - 84/60 = 75 - 84/60 = -9/60 - After reducing the fraction, the answer is -3/20
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