Subtract 18/12 from 42/63
1st number: 42/63, 2nd number: 1 6/12
42/63 - 18/12 is -5/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 12 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 63 × 4 = 252,
42/63 = 42 × 4/63 × 4 = 168/252 - Likewise, for the 2nd fraction, since 12 × 21 = 252,
18/12 = 18 × 21/12 × 21 = 378/252 - Subtract the two like fractions:
168/252 - 378/252 = 168 - 378/252 = -210/252 - After reducing the fraction, the answer is -5/6
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