Add 12/9 and 42/80
1st number: 1 3/9, 2nd number: 42/80
12/9 + 42/80 is 223/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 9 × 80 = 720,
12/9 = 12 × 80/9 × 80 = 960/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
42/80 = 42 × 9/80 × 9 = 378/720 - Add the two like fractions:
960/720 + 378/720 = 960 + 378/720 = 1338/720 - 1338/720 simplified gives 223/120
- So, 12/9 + 42/80 = 223/120
In mixed form: 1103/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/9+42/80 12/9+84/80 12/18+42/80 36/9+42/80 12/27+42/80 60/9+42/80 12/45+42/80 84/9+42/80 12/63+42/80