Add 80/15 and 20/9
1st number: 5 5/15, 2nd number: 2 2/9
80/15 + 20/9 is 68/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 9 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 15 × 3 = 45,
80/15 = 80 × 3/15 × 3 = 240/45 - Likewise, for the 2nd fraction, since 9 × 5 = 45,
20/9 = 20 × 5/9 × 5 = 100/45 - Add the two like fractions:
240/45 + 100/45 = 240 + 100/45 = 340/45 - 340/45 simplified gives 68/9
- So, 80/15 + 20/9 = 68/9
In mixed form: 75/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/15+40/9 80/30+20/9 80/15+20/18 80/15+60/9 80/45+20/9 80/15+20/27 80/75+20/9 80/15+20/45 80/15+20/63