Subtract 10/28 from 81/30
1st number: 2 21/30, 2nd number: 10/28
81/30 - 10/28 is 82/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 28 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 30 × 14 = 420,
81/30 = 81 × 14/30 × 14 = 1134/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
10/28 = 10 × 15/28 × 15 = 150/420 - Subtract the two like fractions:
1134/420 - 150/420 = 1134 - 150/420 = 984/420 - After reducing the fraction, the answer is 82/35
- In mixed form: 212/35
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