Subtract 8/9 from 4/81
4/81 - 8/9 is -68/81.
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,
4/81 = 4 × 1/81 × 1 = 4/81 - Likewise, for the 2nd fraction, since 9 × 9 = 81,
8/9 = 8 × 9/9 × 9 = 72/81 - Subtract the two like fractions:
4/81 - 72/81 = 4 - 72/81 = -68/81
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