Subtract 40/63 from 18/12
1st number: 1 6/12, 2nd number: 40/63
18/12 - 40/63 is 109/126.
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,
40/63 = 40 × 4/63 × 4 = 160/252 - Subtract the two like fractions:
378/252 - 160/252 = 378 - 160/252 = 218/252 - After reducing the fraction, the answer is 109/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/12-40/63 18/12-80/63 18/24-40/63 54/12-40/63 18/36-40/63 90/12-40/63 18/60-40/63 18/84-40/63