Add 80/18 and 15/5
1st number: 4 8/18, 2nd number: 3 0/5
80/18 + 15/5 is 67/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 5 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 5 × 18 = 90,
15/5 = 15 × 18/5 × 18 = 270/90 - Add the two like fractions:
400/90 + 270/90 = 400 + 270/90 = 670/90 - 670/90 simplified gives 67/9
- So, 80/18 + 15/5 = 67/9
In mixed form: 74/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/18+30/5 80/36+15/5 80/18+15/10 80/18+45/5 80/54+15/5 80/18+75/5 80/90+15/5 80/18+15/25 80/18+15/35