Add 18/20 and 28/36
18/20 + 28/36 is 151/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
18/20 = 18 × 9/20 × 9 = 162/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
28/36 = 28 × 5/36 × 5 = 140/180 - Add the two like fractions:
162/180 + 140/180 = 162 + 140/180 = 302/180 - 302/180 simplified gives 151/90
- So, 18/20 + 28/36 = 151/90
In mixed form: 161/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/20+28/36 18/20+56/36 18/40+28/36 18/20+28/72 54/20+28/36 18/20+84/36 18/60+28/36 90/20+28/36