Subtract 21/12 from 1/2
1st number: 1/2, 2nd number: 1 9/12
1/2 - 21/12 is -5/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 12 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 2 × 6 = 12,
1/2 = 1 × 6/2 × 6 = 6/12 - Likewise, for the 2nd fraction, since 12 × 1 = 12,
21/12 = 21 × 1/12 × 1 = 21/12 - Subtract the two like fractions:
6/12 - 21/12 = 6 - 21/12 = -15/12 - After reducing the fraction, the answer is -5/4
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