Add 16/18 and 18/20
16/18 + 18/20 is 161/90.
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,
16/18 = 16 × 10/18 × 10 = 160/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
18/20 = 18 × 9/20 × 9 = 162/180 - Add the two like fractions:
160/180 + 162/180 = 160 + 162/180 = 322/180 - 322/180 simplified gives 161/90
- So, 16/18 + 18/20 = 161/90
In mixed form: 171/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/18+18/20 16/18+36/20 16/36+18/20 16/18+18/40 48/18+18/20 16/18+54/20 16/54+18/20 16/18+18/60 80/18+18/20 16/18+90/20 16/90+18/20