Add 45/20 and 30/9
1st number: 2 5/20, 2nd number: 3 3/9
45/20 + 30/9 is 67/12.
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,
45/20 = 45 × 9/20 × 9 = 405/180 - Likewise, for the 2nd fraction, since 9 × 20 = 180,
30/9 = 30 × 20/9 × 20 = 600/180 - Add the two like fractions:
405/180 + 600/180 = 405 + 600/180 = 1005/180 - 1005/180 simplified gives 67/12
- So, 45/20 + 30/9 = 67/12
In mixed form: 57/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20+30/9 45/20+60/9 45/40+30/9 45/20+30/18 45/20+90/9 45/60+30/9 45/20+30/27 45/20+30/45 45/20+30/63