Subtract 6/9 from 20/81
20/81 - 6/9 is -34/81.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 9 is 81
Next, find the equivalent fraction of both fractional numbers with denominator 81 - For the 1st fraction, since 81 × 1 = 81,
20/81 = 20 × 1/81 × 1 = 20/81 - Likewise, for the 2nd fraction, since 9 × 9 = 81,
6/9 = 6 × 9/9 × 9 = 54/81 - Subtract the two like fractions:
20/81 - 54/81 = 20 - 54/81 = -34/81
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