Subtract 3/21 from 81/4
1st number: 20 1/4, 2nd number: 3/21
81/4 - 3/21 is 563/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
81/4 = 81 × 21/4 × 21 = 1701/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
3/21 = 3 × 4/21 × 4 = 12/84 - Subtract the two like fractions:
1701/84 - 12/84 = 1701 - 12/84 = 1689/84 - After reducing the fraction, the answer is 563/28
- In mixed form: 203/28
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