Add 20/18 and 12/8
1st number: 1 2/18, 2nd number: 1 4/8
20/18 + 12/8 is 47/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 8 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 18 × 4 = 72,
20/18 = 20 × 4/18 × 4 = 80/72 - Likewise, for the 2nd fraction, since 8 × 9 = 72,
12/8 = 12 × 9/8 × 9 = 108/72 - Add the two like fractions:
80/72 + 108/72 = 80 + 108/72 = 188/72 - 188/72 simplified gives 47/18
- So, 20/18 + 12/8 = 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+12/8 20/18+24/8 20/36+12/8 20/18+12/16 60/18+12/8 20/18+36/8 20/54+12/8 20/18+12/24 20/18+60/8 20/90+12/8 20/18+12/40 20/18+84/8 20/18+12/56