Add 20/18 and 12/20
1st number: 1 2/18, 2nd number: 12/20
20/18 + 12/20 is 77/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 18 × 10 = 180,
20/18 = 20 × 10/18 × 10 = 200/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
12/20 = 12 × 9/20 × 9 = 108/180 - Add the two like fractions:
200/180 + 108/180 = 200 + 108/180 = 308/180 - 308/180 simplified gives 77/45
- So, 20/18 + 12/20 = 77/45
In mixed form: 132/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/18+12/20 20/18+24/20 20/36+12/20 20/18+12/40 60/18+12/20 20/18+36/20 20/54+12/20 20/18+12/60 20/18+60/20 20/90+12/20 20/18+84/20