Add 18/8 and 80/15
1st number: 2 2/8, 2nd number: 5 5/15
18/8 + 80/15 is 91/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 15 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 8 × 15 = 120,
18/8 = 18 × 15/8 × 15 = 270/120 - Likewise, for the 2nd fraction, since 15 × 8 = 120,
80/15 = 80 × 8/15 × 8 = 640/120 - Add the two like fractions:
270/120 + 640/120 = 270 + 640/120 = 910/120 - 910/120 simplified gives 91/12
- So, 18/8 + 80/15 = 91/12
In mixed form: 77/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/8+80/15 18/16+80/15 18/8+80/30 54/8+80/15 18/24+80/15 18/8+80/45 90/8+80/15 18/40+80/15 18/8+80/75 18/56+80/15