Add 12/18 and 4/20
12/18 + 4/20 is 13/15.
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,
12/18 = 12 × 10/18 × 10 = 120/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
4/20 = 4 × 9/20 × 9 = 36/180 - Add the two like fractions:
120/180 + 36/180 = 120 + 36/180 = 156/180 - 156/180 simplified gives 13/15
- So, 12/18 + 4/20 = 13/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/18+4/20 12/18+8/20 12/36+4/20 12/18+4/40 36/18+4/20 12/18+12/20 12/54+4/20 12/18+4/60 60/18+4/20 12/90+4/20 84/18+4/20 12/18+28/20