Add 5/20 and 15/9
1st number: 5/20, 2nd number: 1 6/9
5/20 + 15/9 is 23/12.
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,
5/20 = 5 × 9/20 × 9 = 45/180 - Likewise, for the 2nd fraction, since 9 × 20 = 180,
15/9 = 15 × 20/9 × 20 = 300/180 - Add the two like fractions:
45/180 + 300/180 = 45 + 300/180 = 345/180 - 345/180 simplified gives 23/12
- So, 5/20 + 15/9 = 23/12
In mixed form: 111/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/20+15/9 5/20+30/9 5/40+15/9 5/20+15/18 15/20+15/9 5/20+45/9 5/60+15/9 5/20+15/27 25/20+15/9 5/20+75/9 5/20+15/45 35/20+15/9 5/20+15/63