Add 28/18 and 30/20
1st number: 1 10/18, 2nd number: 1 10/20
28/18 + 30/20 is 55/18.
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,
30/20 = 30 × 9/20 × 9 = 270/180 - Add the two like fractions:
280/180 + 270/180 = 280 + 270/180 = 550/180 - 550/180 simplified gives 55/18
- So, 28/18 + 30/20 = 55/18
In mixed form: 31/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/18+30/20 28/18+60/20 28/36+30/20 28/18+30/40 84/18+30/20 28/18+90/20 28/54+30/20 28/18+30/60 28/90+30/20