Subtract 4/6 from 7/81
7/81 - 4/6 is -47/81.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 6 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 81 × 2 = 162,
7/81 = 7 × 2/81 × 2 = 14/162 - Likewise, for the 2nd fraction, since 6 × 27 = 162,
4/6 = 4 × 27/6 × 27 = 108/162 - Subtract the two like fractions:
14/162 - 108/162 = 14 - 108/162 = -94/162 - After reducing the fraction, the answer is -47/81
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