Add 35/18 and 5/21
1st number: 1 17/18, 2nd number: 5/21
35/18 + 5/21 is 275/126.
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,
35/18 = 35 × 7/18 × 7 = 245/126 - Likewise, for the 2nd fraction, since 21 × 6 = 126,
5/21 = 5 × 6/21 × 6 = 30/126 - Add the two like fractions:
245/126 + 30/126 = 245 + 30/126 = 275/126 - So, 35/18 + 5/21 = 275/126
In mixed form: 223/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/18+5/21 35/18+10/21 35/36+5/21 35/18+5/42 35/18+15/21 35/54+5/21 35/18+5/63 35/18+25/21 35/90+5/21 35/18+35/21