Subtract 7/81 from 90/9
1st number: 10 0/9, 2nd number: 7/81
90/9 - 7/81 is 803/81.
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,
90/9 = 90 × 9/9 × 9 = 810/81 - Likewise, for the 2nd fraction, since 81 × 1 = 81,
7/81 = 7 × 1/81 × 1 = 7/81 - Subtract the two like fractions:
810/81 - 7/81 = 810 - 7/81 = 803/81 - In mixed form: 974/81
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