Subtract 12/42 from 49/18
1st number: 2 13/18, 2nd number: 12/42
49/18 - 12/42 is 307/126.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
49/18 = 49 × 7/18 × 7 = 343/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
12/42 = 12 × 3/42 × 3 = 36/126 - Subtract the two like fractions:
343/126 - 36/126 = 343 - 36/126 = 307/126 - In mixed form: 255/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/18-12/42 49/18-24/42 49/36-12/42 49/18-12/84 49/18-36/42 49/54-12/42 49/18-60/42 49/90-12/42 49/18-84/42