Subtract 21/18 from 4/12
1st number: 4/12, 2nd number: 1 3/18
4/12 - 21/18 is -5/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 18 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 12 × 3 = 36,
4/12 = 4 × 3/12 × 3 = 12/36 - Likewise, for the 2nd fraction, since 18 × 2 = 36,
21/18 = 21 × 2/18 × 2 = 42/36 - Subtract the two like fractions:
12/36 - 42/36 = 12 - 42/36 = -30/36 - After reducing the fraction, the answer is -5/6
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