Subtract 12/21 from 3/6
3/6 - 12/21 is -1/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 6 × 7 = 42,
3/6 = 3 × 7/6 × 7 = 21/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
12/21 = 12 × 2/21 × 2 = 24/42 - Subtract the two like fractions:
21/42 - 24/42 = 21 - 24/42 = -3/42 - After reducing the fraction, the answer is -1/14
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