Add 12/20 and 8/18
12/20 + 8/18 is 47/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 18 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
12/20 = 12 × 9/20 × 9 = 108/180 - Likewise, for the 2nd fraction, since 18 × 10 = 180,
8/18 = 8 × 10/18 × 10 = 80/180 - Add the two like fractions:
108/180 + 80/180 = 108 + 80/180 = 188/180 - 188/180 simplified gives 47/45
- So, 12/20 + 8/18 = 47/45
In mixed form: 12/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/20+8/18 12/20+16/18 12/40+8/18 12/20+8/36 36/20+8/18 12/20+24/18 12/60+8/18 12/20+8/54 60/20+8/18 12/20+40/18 12/20+8/90 84/20+8/18 12/20+56/18