Subtract 12/4 from 9/42
1st number: 9/42, 2nd number: 3 0/4
9/42 - 12/4 is -39/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 42 × 2 = 84,
9/42 = 9 × 2/42 × 2 = 18/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
12/4 = 12 × 21/4 × 21 = 252/84 - Subtract the two like fractions:
18/84 - 252/84 = 18 - 252/84 = -234/84 - After reducing the fraction, the answer is -39/14
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