Subtract 90/81 from 1/3
1st number: 1/3, 2nd number: 1 9/81
1/3 - 90/81 is -7/9.
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,
1/3 = 1 × 27/3 × 27 = 27/81 - Likewise, for the 2nd fraction, since 81 × 1 = 81,
90/81 = 90 × 1/81 × 1 = 90/81 - Subtract the two like fractions:
27/81 - 90/81 = 27 - 90/81 = -63/81 - After reducing the fraction, the answer is -7/9
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