Add 28/18 and 9/20
1st number: 1 10/18, 2nd number: 9/20
28/18 + 9/20 is 361/180.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 18 × 10 = 180,
28/18 = 28 × 10/18 × 10 = 280/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
9/20 = 9 × 9/20 × 9 = 81/180 - Add the two like fractions:
280/180 + 81/180 = 280 + 81/180 = 361/180 - So, 28/18 + 9/20 = 361/180
In mixed form: 21/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/18+9/20 28/18+18/20 28/36+9/20 28/18+9/40 84/18+9/20 28/18+27/20 28/54+9/20 28/18+9/60 28/18+45/20 28/90+9/20 28/18+63/20