Subtract 8/81 from 90/30
1st number: 3 0/30, 2nd number: 8/81
90/30 - 8/81 is 235/81.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 81 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 30 × 27 = 810,
90/30 = 90 × 27/30 × 27 = 2430/810 - Likewise, for the 2nd fraction, since 81 × 10 = 810,
8/81 = 8 × 10/81 × 10 = 80/810 - Subtract the two like fractions:
2430/810 - 80/810 = 2430 - 80/810 = 2350/810 - After reducing the fraction, the answer is 235/81
- In mixed form: 273/81
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