Subtract 21/54 from 10/40
10/40 - 21/54 is -5/36.
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,
10/40 = 10 × 27/40 × 27 = 270/1080 - Likewise, for the 2nd fraction, since 54 × 20 = 1080,
21/54 = 21 × 20/54 × 20 = 420/1080 - Subtract the two like fractions:
270/1080 - 420/1080 = 270 - 420/1080 = -150/1080 - After reducing the fraction, the answer is -5/36
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