Subtract 18/12 from 12/63
1st number: 12/63, 2nd number: 1 6/12
12/63 - 18/12 is -55/42.
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,
12/63 = 12 × 4/63 × 4 = 48/252 - Likewise, for the 2nd fraction, since 12 × 21 = 252,
18/12 = 18 × 21/12 × 21 = 378/252 - Subtract the two like fractions:
48/252 - 378/252 = 48 - 378/252 = -330/252 - After reducing the fraction, the answer is -55/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/63-18/12 12/63-36/12 12/63-18/24 36/63-18/12 12/63-54/12 12/63-18/36 60/63-18/12 12/63-90/12 12/63-18/60 84/63-18/12 12/63-18/84