Add 30/20 and 81/30
1st number: 1 10/20, 2nd number: 2 21/30
30/20 + 81/30 is 21/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 30 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
30/20 = 30 × 3/20 × 3 = 90/60 - Likewise, for the 2nd fraction, since 30 × 2 = 60,
81/30 = 81 × 2/30 × 2 = 162/60 - Add the two like fractions:
90/60 + 162/60 = 90 + 162/60 = 252/60 - 252/60 simplified gives 21/5
- So, 30/20 + 81/30 = 21/5
In mixed form: 41/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/20+81/30 30/40+81/30 30/20+81/60 90/20+81/30 30/60+81/30 30/20+81/90