Add 15/18 and 2/8
15/18 + 2/8 is 13/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 8 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 18 × 4 = 72,
15/18 = 15 × 4/18 × 4 = 60/72 - Likewise, for the 2nd fraction, since 8 × 9 = 72,
2/8 = 2 × 9/8 × 9 = 18/72 - Add the two like fractions:
60/72 + 18/72 = 60 + 18/72 = 78/72 - 78/72 simplified gives 13/12
- So, 15/18 + 2/8 = 13/12
In mixed form: 11/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/18+2/8 15/18+4/8 15/36+2/8 15/18+2/16 45/18+2/8 15/18+6/8 15/54+2/8 15/18+2/24 75/18+2/8 15/18+10/8 15/90+2/8 15/18+2/40 15/18+14/8 15/18+2/56