Subtract 2/7 from 8/42
8/42 - 2/7 is -2/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 7 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
8/42 = 8 × 1/42 × 1 = 8/42 - Likewise, for the 2nd fraction, since 7 × 6 = 42,
2/7 = 2 × 6/7 × 6 = 12/42 - Subtract the two like fractions:
8/42 - 12/42 = 8 - 12/42 = -4/42 - After reducing the fraction, the answer is -2/21
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