Subtract 18/27 from 20/36
20/36 - 18/27 is -1/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 27 is 108
Next, find the equivalent fraction of both fractional numbers with denominator 108 - For the 1st fraction, since 36 × 3 = 108,
20/36 = 20 × 3/36 × 3 = 60/108 - Likewise, for the 2nd fraction, since 27 × 4 = 108,
18/27 = 18 × 4/27 × 4 = 72/108 - Subtract the two like fractions:
60/108 - 72/108 = 60 - 72/108 = -12/108 - After reducing the fraction, the answer is -1/9
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