Subtract 12/21 from 49/18
1st number: 2 13/18, 2nd number: 12/21
49/18 - 12/21 is 271/126.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 21 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 21 × 6 = 126,
12/21 = 12 × 6/21 × 6 = 72/126 - Subtract the two like fractions:
343/126 - 72/126 = 343 - 72/126 = 271/126 - In mixed form: 219/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/18-12/21 49/18-24/21 49/36-12/21 49/18-12/42 49/18-36/21 49/54-12/21 49/18-12/63 49/18-60/21 49/90-12/21 49/18-84/21