Add 9/15 and 20/12
1st number: 9/15, 2nd number: 1 8/12
9/15 + 20/12 is 34/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
9/15 = 9 × 4/15 × 4 = 36/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
20/12 = 20 × 5/12 × 5 = 100/60 - Add the two like fractions:
36/60 + 100/60 = 36 + 100/60 = 136/60 - 136/60 simplified gives 34/15
- So, 9/15 + 20/12 = 34/15
In mixed form: 24/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/15+20/12 9/15+40/12 9/30+20/12 9/15+20/24 27/15+20/12 9/15+60/12 9/45+20/12 9/15+20/36 45/15+20/12 9/75+20/12 9/15+20/60 63/15+20/12 9/15+20/84