Add 18/20 and 35/9
1st number: 18/20, 2nd number: 3 8/9
18/20 + 35/9 is 431/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 9 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 9 × 20 = 180,
35/9 = 35 × 20/9 × 20 = 700/180 - Add the two like fractions:
162/180 + 700/180 = 162 + 700/180 = 862/180 - 862/180 simplified gives 431/90
- So, 18/20 + 35/9 = 431/90
In mixed form: 471/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/20+35/9 18/20+70/9 18/40+35/9 18/20+35/18 54/20+35/9 18/60+35/9 18/20+35/27 90/20+35/9 18/20+35/45 18/20+35/63