Subtract 21/12 from 12/3
1st number: 4 0/3, 2nd number: 1 9/12
12/3 - 21/12 is 9/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 12 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 3 × 4 = 12,
12/3 = 12 × 4/3 × 4 = 48/12 - Likewise, for the 2nd fraction, since 12 × 1 = 12,
21/12 = 21 × 1/12 × 1 = 21/12 - Subtract the two like fractions:
48/12 - 21/12 = 48 - 21/12 = 27/12 - After reducing the fraction, the answer is 9/4
- In mixed form: 21/4
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