Add 21/7 and 10/18
1st number: 3 0/7, 2nd number: 10/18
21/7 + 10/18 is 32/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 7 × 18 = 126,
21/7 = 21 × 18/7 × 18 = 378/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
10/18 = 10 × 7/18 × 7 = 70/126 - Add the two like fractions:
378/126 + 70/126 = 378 + 70/126 = 448/126 - 448/126 simplified gives 32/9
- So, 21/7 + 10/18 = 32/9
In mixed form: 35/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/7+10/18 21/7+20/18 21/14+10/18 21/7+10/36 63/7+10/18 21/7+30/18 21/7+10/54 21/7+50/18 21/35+10/18 21/7+10/90 21/7+70/18 21/49+10/18