Subtract 21/10 from 27/28
1st number: 27/28, 2nd number: 2 1/10
27/28 - 21/10 is -159/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 10 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
27/28 = 27 × 5/28 × 5 = 135/140 - Likewise, for the 2nd fraction, since 10 × 14 = 140,
21/10 = 21 × 14/10 × 14 = 294/140 - Subtract the two like fractions:
135/140 - 294/140 = 135 - 294/140 = -159/140
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