Subtract 28/54 from 18/40
18/40 - 28/54 is -37/540.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 54 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 54 × 20 = 1080,
28/54 = 28 × 20/54 × 20 = 560/1080 - Subtract the two like fractions:
486/1080 - 560/1080 = 486 - 560/1080 = -74/1080 - After reducing the fraction, the answer is -37/540
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