Add 8/18 and 20/15
1st number: 8/18, 2nd number: 1 5/15
8/18 + 20/15 is 16/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 15 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
8/18 = 8 × 5/18 × 5 = 40/90 - Likewise, for the 2nd fraction, since 15 × 6 = 90,
20/15 = 20 × 6/15 × 6 = 120/90 - Add the two like fractions:
40/90 + 120/90 = 40 + 120/90 = 160/90 - 160/90 simplified gives 16/9
- So, 8/18 + 20/15 = 16/9
In mixed form: 17/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/18+20/15 8/18+40/15 8/36+20/15 8/18+20/30 24/18+20/15 8/18+60/15 8/54+20/15 8/18+20/45 40/18+20/15 8/90+20/15 8/18+20/75 56/18+20/15