Subtract 5/21 from 6/42
6/42 - 5/21 is -2/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
6/42 = 6 × 1/42 × 1 = 6/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
5/21 = 5 × 2/21 × 2 = 10/42 - Subtract the two like fractions:
6/42 - 10/42 = 6 - 10/42 = -4/42 - After reducing the fraction, the answer is -2/21
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