Add 4/20 and 12/9
1st number: 4/20, 2nd number: 1 3/9
4/20 + 12/9 is 23/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 9 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 9 × 20 = 180,
12/9 = 12 × 20/9 × 20 = 240/180 - Add the two like fractions:
36/180 + 240/180 = 36 + 240/180 = 276/180 - 276/180 simplified gives 23/15
- So, 4/20 + 12/9 = 23/15
In mixed form: 18/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/20+12/9 4/20+24/9 4/40+12/9 4/20+12/18 12/20+12/9 4/20+36/9 4/60+12/9 4/20+12/27 4/20+60/9 4/20+12/45 28/20+12/9 4/20+84/9 4/20+12/63