Add 12/9 and 18/7
1st number: 1 3/9, 2nd number: 2 4/7
12/9 + 18/7 is 82/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 7 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 9 × 7 = 63,
12/9 = 12 × 7/9 × 7 = 84/63 - Likewise, for the 2nd fraction, since 7 × 9 = 63,
18/7 = 18 × 9/7 × 9 = 162/63 - Add the two like fractions:
84/63 + 162/63 = 84 + 162/63 = 246/63 - 246/63 simplified gives 82/21
- So, 12/9 + 18/7 = 82/21
In mixed form: 319/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/9+18/7 12/9+36/7 12/18+18/7 12/9+18/14 36/9+18/7 12/9+54/7 12/27+18/7 12/9+18/21 60/9+18/7 12/9+90/7 12/45+18/7 12/9+18/35 84/9+18/7 12/63+18/7 12/9+18/49