Subtract 90/81 from 1/6
1st number: 1/6, 2nd number: 1 9/81
1/6 - 90/81 is -17/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 81 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 6 × 27 = 162,
1/6 = 1 × 27/6 × 27 = 27/162 - Likewise, for the 2nd fraction, since 81 × 2 = 162,
90/81 = 90 × 2/81 × 2 = 180/162 - Subtract the two like fractions:
27/162 - 180/162 = 27 - 180/162 = -153/162 - After reducing the fraction, the answer is -17/18
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