Subtract 42/27 from 18/40
1st number: 18/40, 2nd number: 1 15/27
18/40 - 42/27 is -199/180.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 27 is 1080
Next, find the equivalent fraction of both fractional numbers with denominator 1080 - For the 1st fraction, since 40 × 27 = 1080,
18/40 = 18 × 27/40 × 27 = 486/1080 - Likewise, for the 2nd fraction, since 27 × 40 = 1080,
42/27 = 42 × 40/27 × 40 = 1680/1080 - Subtract the two like fractions:
486/1080 - 1680/1080 = 486 - 1680/1080 = -1194/1080 - After reducing the fraction, the answer is -199/180
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