Add 10/9 and 81/20
1st number: 1 1/9, 2nd number: 4 1/20
10/9 + 81/20 is 929/180.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 9 × 20 = 180,
10/9 = 10 × 20/9 × 20 = 200/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
81/20 = 81 × 9/20 × 9 = 729/180 - Add the two like fractions:
200/180 + 729/180 = 200 + 729/180 = 929/180 - So, 10/9 + 81/20 = 929/180
In mixed form: 529/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/9+81/20 10/18+81/20 10/9+81/40 30/9+81/20 10/27+81/20 10/9+81/60 50/9+81/20 10/45+81/20 70/9+81/20 10/63+81/20