Subtract 21/14 from 45/12
1st number: 3 9/12, 2nd number: 1 7/14
45/12 - 21/14 is 9/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 14 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
45/12 = 45 × 7/12 × 7 = 315/84 - Likewise, for the 2nd fraction, since 14 × 6 = 84,
21/14 = 21 × 6/14 × 6 = 126/84 - Subtract the two like fractions:
315/84 - 126/84 = 315 - 126/84 = 189/84 - After reducing the fraction, the answer is 9/4
- In mixed form: 21/4
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