Subtract 50/54 from 42/81
42/81 - 50/54 is -11/27.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 54 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 81 × 2 = 162,
42/81 = 42 × 2/81 × 2 = 84/162 - Likewise, for the 2nd fraction, since 54 × 3 = 162,
50/54 = 50 × 3/54 × 3 = 150/162 - Subtract the two like fractions:
84/162 - 150/162 = 84 - 150/162 = -66/162 - After reducing the fraction, the answer is -11/27
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Related: 84/81-50/54