Subtract 81/42 from 49/63
1st number: 49/63, 2nd number: 1 39/42
49/63 - 81/42 is -145/126.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 63 × 2 = 126,
49/63 = 49 × 2/63 × 2 = 98/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
81/42 = 81 × 3/42 × 3 = 243/126 - Subtract the two like fractions:
98/126 - 243/126 = 98 - 243/126 = -145/126
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