Add 15/18 and 18/8
1st number: 15/18, 2nd number: 2 2/8
15/18 + 18/8 is 37/12.
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,
18/8 = 18 × 9/8 × 9 = 162/72 - Add the two like fractions:
60/72 + 162/72 = 60 + 162/72 = 222/72 - 222/72 simplified gives 37/12
- So, 15/18 + 18/8 = 37/12
In mixed form: 31/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/18+18/8 15/18+36/8 15/36+18/8 15/18+18/16 45/18+18/8 15/18+54/8 15/54+18/8 15/18+18/24 75/18+18/8 15/18+90/8 15/90+18/8 15/18+18/40 15/18+18/56