Add 20/18 and 18/12
1st number: 1 2/18, 2nd number: 1 6/12
20/18 + 18/12 is 47/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 12 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 18 × 2 = 36,
20/18 = 20 × 2/18 × 2 = 40/36 - Likewise, for the 2nd fraction, since 12 × 3 = 36,
18/12 = 18 × 3/12 × 3 = 54/36 - Add the two like fractions:
40/36 + 54/36 = 40 + 54/36 = 94/36 - 94/36 simplified gives 47/18
- So, 20/18 + 18/12 = 47/18
In mixed form: 211/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/18+18/12 20/18+36/12 20/36+18/12 20/18+18/24 60/18+18/12 20/18+54/12 20/54+18/12 20/18+18/36 20/18+90/12 20/90+18/12 20/18+18/60 20/18+18/84