Subtract 45/12 from 42/30
1st number: 1 12/30, 2nd number: 3 9/12
42/30 - 45/12 is -47/20.
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,
42/30 = 42 × 2/30 × 2 = 84/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
45/12 = 45 × 5/12 × 5 = 225/60 - Subtract the two like fractions:
84/60 - 225/60 = 84 - 225/60 = -141/60 - After reducing the fraction, the answer is -47/20
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