Add 12/18 and 18/7
1st number: 12/18, 2nd number: 2 4/7
12/18 + 18/7 is 68/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 7 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
12/18 = 12 × 7/18 × 7 = 84/126 - Likewise, for the 2nd fraction, since 7 × 18 = 126,
18/7 = 18 × 18/7 × 18 = 324/126 - Add the two like fractions:
84/126 + 324/126 = 84 + 324/126 = 408/126 - 408/126 simplified gives 68/21
- So, 12/18 + 18/7 = 68/21
In mixed form: 35/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/18+18/7 12/18+36/7 12/36+18/7 12/18+18/14 36/18+18/7 12/18+54/7 12/54+18/7 12/18+18/21 60/18+18/7 12/18+90/7 12/90+18/7 12/18+18/35 84/18+18/7 12/18+18/49