Subtract 42/12 from 28/30
1st number: 28/30, 2nd number: 3 6/12
28/30 - 42/12 is -77/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 30 × 2 = 60,
28/30 = 28 × 2/30 × 2 = 56/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
42/12 = 42 × 5/12 × 5 = 210/60 - Subtract the two like fractions:
56/60 - 210/60 = 56 - 210/60 = -154/60 - After reducing the fraction, the answer is -77/30
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