Subtract 18/54 from 12/40
12/40 - 18/54 is -1/30.
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,
12/40 = 12 × 27/40 × 27 = 324/1080 - Likewise, for the 2nd fraction, since 54 × 20 = 1080,
18/54 = 18 × 20/54 × 20 = 360/1080 - Subtract the two like fractions:
324/1080 - 360/1080 = 324 - 360/1080 = -36/1080 - After reducing the fraction, the answer is -1/30
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