Add 3/20 and 21/18
1st number: 3/20, 2nd number: 1 3/18
3/20 + 21/18 is 79/60.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 18 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
3/20 = 3 × 9/20 × 9 = 27/180 - Likewise, for the 2nd fraction, since 18 × 10 = 180,
21/18 = 21 × 10/18 × 10 = 210/180 - Add the two like fractions:
27/180 + 210/180 = 27 + 210/180 = 237/180 - 237/180 simplified gives 79/60
- So, 3/20 + 21/18 = 79/60
In mixed form: 119/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/20+21/18 3/20+42/18 3/40+21/18 3/20+21/36 9/20+21/18 3/20+63/18 3/60+21/18 3/20+21/54 15/20+21/18 3/20+21/90 21/20+21/18