Add 28/18 and 21/60
1st number: 1 10/18, 2nd number: 21/60
28/18 + 21/60 is 343/180.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 60 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 60 × 3 = 180,
21/60 = 21 × 3/60 × 3 = 63/180 - Add the two like fractions:
280/180 + 63/180 = 280 + 63/180 = 343/180 - So, 28/18 + 21/60 = 343/180
In mixed form: 1163/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/18+21/60 28/18+42/60 28/36+21/60 84/18+21/60 28/18+63/60 28/54+21/60 28/90+21/60