Subtract 54/63 from 6/42
6/42 - 54/63 is -5/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 63 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 42 × 3 = 126,
6/42 = 6 × 3/42 × 3 = 18/126 - Likewise, for the 2nd fraction, since 63 × 2 = 126,
54/63 = 54 × 2/63 × 2 = 108/126 - Subtract the two like fractions:
18/126 - 108/126 = 18 - 108/126 = -90/126 - After reducing the fraction, the answer is -5/7
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