Subtract 45/28 from 21/27
1st number: 21/27, 2nd number: 1 17/28
21/27 - 45/28 is -209/252.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 28 is 756
Next, find the equivalent fraction of both fractional numbers with denominator 756 - For the 1st fraction, since 27 × 28 = 756,
21/27 = 21 × 28/27 × 28 = 588/756 - Likewise, for the 2nd fraction, since 28 × 27 = 756,
45/28 = 45 × 27/28 × 27 = 1215/756 - Subtract the two like fractions:
588/756 - 1215/756 = 588 - 1215/756 = -627/756 - After reducing the fraction, the answer is -209/252
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