Add 49/18 and 81/21
1st number: 2 13/18, 2nd number: 3 18/21
49/18 + 81/21 is 829/126.
Steps for adding 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,
81/21 = 81 × 6/21 × 6 = 486/126 - Add the two like fractions:
343/126 + 486/126 = 343 + 486/126 = 829/126 - So, 49/18 + 81/21 = 829/126
In mixed form: 673/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/18+81/21 49/36+81/21 49/18+81/42 49/54+81/21 49/18+81/63 49/90+81/21