Subtract 81/28 from 21/4
1st number: 5 1/4, 2nd number: 2 25/28
21/4 - 81/28 is 33/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 28 is 28
Next, find the equivalent fraction of both fractional numbers with denominator 28 - For the 1st fraction, since 4 × 7 = 28,
21/4 = 21 × 7/4 × 7 = 147/28 - Likewise, for the 2nd fraction, since 28 × 1 = 28,
81/28 = 81 × 1/28 × 1 = 81/28 - Subtract the two like fractions:
147/28 - 81/28 = 147 - 81/28 = 66/28 - After reducing the fraction, the answer is 33/14
- In mixed form: 25/14
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