Subtract 90/81 from 28/9
1st number: 3 1/9, 2nd number: 1 9/81
28/9 - 90/81 is 2/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 81 is 81
Next, find the equivalent fraction of both fractional numbers with denominator 81 - For the 1st fraction, since 9 × 9 = 81,
28/9 = 28 × 9/9 × 9 = 252/81 - Likewise, for the 2nd fraction, since 81 × 1 = 81,
90/81 = 90 × 1/81 × 1 = 90/81 - Subtract the two like fractions:
252/81 - 90/81 = 252 - 90/81 = 162/81 - After reducing the fraction, the answer is 2/1
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