Add 18/8 and 12/9
1st number: 2 2/8, 2nd number: 1 3/9
18/8 + 12/9 is 43/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 9 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 8 × 9 = 72,
18/8 = 18 × 9/8 × 9 = 162/72 - Likewise, for the 2nd fraction, since 9 × 8 = 72,
12/9 = 12 × 8/9 × 8 = 96/72 - Add the two like fractions:
162/72 + 96/72 = 162 + 96/72 = 258/72 - 258/72 simplified gives 43/12
- So, 18/8 + 12/9 = 43/12
In mixed form: 37/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/8+12/9 18/8+24/9 18/16+12/9 18/8+12/18 54/8+12/9 18/8+36/9 18/24+12/9 18/8+12/27 90/8+12/9 18/8+60/9 18/40+12/9 18/8+12/45 18/8+84/9 18/56+12/9 18/8+12/63