Subtract 2/3 from 12/42
12/42 - 2/3 is -8/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 3 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
12/42 = 12 × 1/42 × 1 = 12/42 - Likewise, for the 2nd fraction, since 3 × 14 = 42,
2/3 = 2 × 14/3 × 14 = 28/42 - Subtract the two like fractions:
12/42 - 28/42 = 12 - 28/42 = -16/42 - After reducing the fraction, the answer is -8/21
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