Subtract 81/28 from 21/3
1st number: 7 0/3, 2nd number: 2 25/28
21/3 - 81/28 is 115/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 28 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 3 × 28 = 84,
21/3 = 21 × 28/3 × 28 = 588/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
81/28 = 81 × 3/28 × 3 = 243/84 - Subtract the two like fractions:
588/84 - 243/84 = 588 - 243/84 = 345/84 - After reducing the fraction, the answer is 115/28
- In mixed form: 43/28
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