Add 12/18 and 3/9
12/18 + 3/9 is 1/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 9 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 18 × 1 = 18,
12/18 = 12 × 1/18 × 1 = 12/18 - Likewise, for the 2nd fraction, since 9 × 2 = 18,
3/9 = 3 × 2/9 × 2 = 6/18 - Add the two like fractions:
12/18 + 6/18 = 12 + 6/18 = 18/18 - 18/18 simplified gives 1/1
- So, 12/18 + 3/9 = 1/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/18+3/9 12/18+6/9 12/36+3/9 12/18+3/18 36/18+3/9 12/54+3/9 12/18+3/27 60/18+3/9 12/18+15/9 12/90+3/9 12/18+3/45 84/18+3/9 12/18+21/9 12/18+3/63