Subtract 72/81 from 2/3
2/3 - 72/81 is -2/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 81 is 81
Next, find the equivalent fraction of both fractional numbers with denominator 81 - For the 1st fraction, since 3 × 27 = 81,
2/3 = 2 × 27/3 × 27 = 54/81 - Likewise, for the 2nd fraction, since 81 × 1 = 81,
72/81 = 72 × 1/81 × 1 = 72/81 - Subtract the two like fractions:
54/81 - 72/81 = 54 - 72/81 = -18/81 - After reducing the fraction, the answer is -2/9
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