Subtract 21/12 from 40/14
1st number: 2 12/14, 2nd number: 1 9/12
40/14 - 21/12 is 31/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 14 × 6 = 84,
40/14 = 40 × 6/14 × 6 = 240/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
21/12 = 21 × 7/12 × 7 = 147/84 - Subtract the two like fractions:
240/84 - 147/84 = 240 - 147/84 = 93/84 - After reducing the fraction, the answer is 31/28
- In mixed form: 13/28
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