Subtract 70/27 from 21/12
1st number: 1 9/12, 2nd number: 2 16/27
21/12 - 70/27 is -91/108.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 27 is 108
Next, find the equivalent fraction of both fractional numbers with denominator 108 - For the 1st fraction, since 12 × 9 = 108,
21/12 = 21 × 9/12 × 9 = 189/108 - Likewise, for the 2nd fraction, since 27 × 4 = 108,
70/27 = 70 × 4/27 × 4 = 280/108 - Subtract the two like fractions:
189/108 - 280/108 = 189 - 280/108 = -91/108
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