Subtract 21/12 from 45/4
1st number: 11 1/4, 2nd number: 1 9/12
45/4 - 21/12 is 19/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 12 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 4 × 3 = 12,
45/4 = 45 × 3/4 × 3 = 135/12 - Likewise, for the 2nd fraction, since 12 × 1 = 12,
21/12 = 21 × 1/12 × 1 = 21/12 - Subtract the two like fractions:
135/12 - 21/12 = 135 - 21/12 = 114/12 - After reducing the fraction, the answer is 19/2
- In mixed form: 91/2
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