Add 20/15 and 16/18
1st number: 1 5/15, 2nd number: 16/18
20/15 + 16/18 is 20/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 15 × 6 = 90,
20/15 = 20 × 6/15 × 6 = 120/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
16/18 = 16 × 5/18 × 5 = 80/90 - Add the two like fractions:
120/90 + 80/90 = 120 + 80/90 = 200/90 - 200/90 simplified gives 20/9
- So, 20/15 + 16/18 = 20/9
In mixed form: 22/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/15+16/18 20/15+32/18 20/30+16/18 20/15+16/36 60/15+16/18 20/15+48/18 20/45+16/18 20/15+16/54 20/15+80/18 20/75+16/18 20/15+16/90