Add 30/9 and 75/20
1st number: 3 3/9, 2nd number: 3 15/20
30/9 + 75/20 is 85/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 9 × 20 = 180,
30/9 = 30 × 20/9 × 20 = 600/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
75/20 = 75 × 9/20 × 9 = 675/180 - Add the two like fractions:
600/180 + 675/180 = 600 + 675/180 = 1275/180 - 1275/180 simplified gives 85/12
- So, 30/9 + 75/20 = 85/12
In mixed form: 71/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/9+75/20 30/18+75/20 30/9+75/40 90/9+75/20 30/27+75/20 30/9+75/60 30/45+75/20 30/63+75/20