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