Subtract 42/81 from 12/54
12/54 - 42/81 is -8/27.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 81 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 54 × 3 = 162,
12/54 = 12 × 3/54 × 3 = 36/162 - Likewise, for the 2nd fraction, since 81 × 2 = 162,
42/81 = 42 × 2/81 × 2 = 84/162 - Subtract the two like fractions:
36/162 - 84/162 = 36 - 84/162 = -48/162 - After reducing the fraction, the answer is -8/27
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