Add 12/20 and 9/30
12/20 + 9/30 is 9/10.
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,
12/20 = 12 × 3/20 × 3 = 36/60 - Likewise, for the 2nd fraction, since 30 × 2 = 60,
9/30 = 9 × 2/30 × 2 = 18/60 - Add the two like fractions:
36/60 + 18/60 = 36 + 18/60 = 54/60 - 54/60 simplified gives 9/10
- So, 12/20 + 9/30 = 9/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/20+9/30 12/20+18/30 12/40+9/30 12/20+9/60 36/20+9/30 12/20+27/30 12/60+9/30 12/20+9/90 60/20+9/30 12/20+45/30 84/20+9/30 12/20+63/30