Subtract 21/12 from 25/27
1st number: 25/27, 2nd number: 1 9/12
25/27 - 21/12 is -89/108.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 12 is 108
Next, find the equivalent fraction of both fractional numbers with denominator 108 - For the 1st fraction, since 27 × 4 = 108,
25/27 = 25 × 4/27 × 4 = 100/108 - Likewise, for the 2nd fraction, since 12 × 9 = 108,
21/12 = 21 × 9/12 × 9 = 189/108 - Subtract the two like fractions:
100/108 - 189/108 = 100 - 189/108 = -89/108
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