Subtract 27/21 from 27/28
1st number: 27/28, 2nd number: 1 6/21
27/28 - 27/21 is -9/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
27/28 = 27 × 3/28 × 3 = 81/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
27/21 = 27 × 4/21 × 4 = 108/84 - Subtract the two like fractions:
81/84 - 108/84 = 81 - 108/84 = -27/84 - After reducing the fraction, the answer is -9/28
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