Add 72/30 and 9/20
1st number: 2 12/30, 2nd number: 9/20
72/30 + 9/20 is 57/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 30 × 2 = 60,
72/30 = 72 × 2/30 × 2 = 144/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
9/20 = 9 × 3/20 × 3 = 27/60 - Add the two like fractions:
144/60 + 27/60 = 144 + 27/60 = 171/60 - 171/60 simplified gives 57/20
- So, 72/30 + 9/20 = 57/20
In mixed form: 217/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/30+18/20 72/60+9/20 72/30+9/40 72/30+27/20 72/90+9/20 72/30+9/60 72/30+45/20 72/30+63/20