Subtract 81/12 from 21/14
1st number: 1 7/14, 2nd number: 6 9/12
21/14 - 81/12 is -21/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 14 × 6 = 84,
21/14 = 21 × 6/14 × 6 = 126/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
81/12 = 81 × 7/12 × 7 = 567/84 - Subtract the two like fractions:
126/84 - 567/84 = 126 - 567/84 = -441/84 - After reducing the fraction, the answer is -21/4
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