Add 20/18 and 18/9
1st number: 1 2/18, 2nd number: 2 0/9
20/18 + 18/9 is 28/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 9 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 18 × 1 = 18,
20/18 = 20 × 1/18 × 1 = 20/18 - Likewise, for the 2nd fraction, since 9 × 2 = 18,
18/9 = 18 × 2/9 × 2 = 36/18 - Add the two like fractions:
20/18 + 36/18 = 20 + 36/18 = 56/18 - 56/18 simplified gives 28/9
- So, 20/18 + 18/9 = 28/9
In mixed form: 31/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/18+18/9 20/18+36/9 20/36+18/9 60/18+18/9 20/18+54/9 20/54+18/9 20/18+18/27 20/18+90/9 20/90+18/9 20/18+18/45 20/18+18/63