Subtract 1/81 from 7/27
7/27 - 1/81 is 20/81.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 81 is 81
Next, find the equivalent fraction of both fractional numbers with denominator 81 - For the 1st fraction, since 27 × 3 = 81,
7/27 = 7 × 3/27 × 3 = 21/81 - Likewise, for the 2nd fraction, since 81 × 1 = 81,
1/81 = 1 × 1/81 × 1 = 1/81 - Subtract the two like fractions:
21/81 - 1/81 = 21 - 1/81 = 20/81
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