Add 15/9 and 30/8
1st number: 1 6/9, 2nd number: 3 6/8
15/9 + 30/8 is 65/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 8 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 9 × 8 = 72,
15/9 = 15 × 8/9 × 8 = 120/72 - Likewise, for the 2nd fraction, since 8 × 9 = 72,
30/8 = 30 × 9/8 × 9 = 270/72 - Add the two like fractions:
120/72 + 270/72 = 120 + 270/72 = 390/72 - 390/72 simplified gives 65/12
- So, 15/9 + 30/8 = 65/12
In mixed form: 55/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/9+30/8 15/9+60/8 15/18+30/8 15/9+30/16 45/9+30/8 15/9+90/8 15/27+30/8 15/9+30/24 75/9+30/8 15/45+30/8 15/9+30/40 15/63+30/8 15/9+30/56