Subtract 42/63 from 18/12
1st number: 1 6/12, 2nd number: 42/63
18/12 - 42/63 is 5/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 63 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 12 × 21 = 252,
18/12 = 18 × 21/12 × 21 = 378/252 - Likewise, for the 2nd fraction, since 63 × 4 = 252,
42/63 = 42 × 4/63 × 4 = 168/252 - Subtract the two like fractions:
378/252 - 168/252 = 378 - 168/252 = 210/252 - After reducing the fraction, the answer is 5/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/12-42/63 18/12-84/63 18/24-42/63 54/12-42/63 18/36-42/63 90/12-42/63 18/60-42/63 18/84-42/63