Add 80/18 and 28/15
1st number: 4 8/18, 2nd number: 1 13/15
80/18 + 28/15 is 284/45.
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,
80/18 = 80 × 5/18 × 5 = 400/90 - Likewise, for the 2nd fraction, since 15 × 6 = 90,
28/15 = 28 × 6/15 × 6 = 168/90 - Add the two like fractions:
400/90 + 168/90 = 400 + 168/90 = 568/90 - 568/90 simplified gives 284/45
- So, 80/18 + 28/15 = 284/45
In mixed form: 614/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/18+56/15 80/36+28/15 80/18+28/30 80/18+84/15 80/54+28/15 80/18+28/45 80/90+28/15 80/18+28/75