Subtract 42/30 from 12/18
1st number: 12/18, 2nd number: 1 12/30
12/18 - 42/30 is -11/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 30 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
12/18 = 12 × 5/18 × 5 = 60/90 - Likewise, for the 2nd fraction, since 30 × 3 = 90,
42/30 = 42 × 3/30 × 3 = 126/90 - Subtract the two like fractions:
60/90 - 126/90 = 60 - 126/90 = -66/90 - After reducing the fraction, the answer is -11/15
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