Add 18/8 and 30/9
1st number: 2 2/8, 2nd number: 3 3/9
18/8 + 30/9 is 67/12.
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,
30/9 = 30 × 8/9 × 8 = 240/72 - Add the two like fractions:
162/72 + 240/72 = 162 + 240/72 = 402/72 - 402/72 simplified gives 67/12
- So, 18/8 + 30/9 = 67/12
In mixed form: 57/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/8+30/9 18/8+60/9 18/16+30/9 18/8+30/18 54/8+30/9 18/8+90/9 18/24+30/9 18/8+30/27 90/8+30/9 18/40+30/9 18/8+30/45 18/56+30/9 18/8+30/63