Add 12/4 and 9/15
1st number: 3 0/4, 2nd number: 9/15
12/4 + 9/15 is 18/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 4 × 15 = 60,
12/4 = 12 × 15/4 × 15 = 180/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
9/15 = 9 × 4/15 × 4 = 36/60 - Add the two like fractions:
180/60 + 36/60 = 180 + 36/60 = 216/60 - 216/60 simplified gives 18/5
- So, 12/4 + 9/15 = 18/5
In mixed form: 33/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/4+9/15 12/4+18/15 12/8+9/15 12/4+9/30 36/4+9/15 12/4+27/15 12/4+9/45 60/4+9/15 12/4+45/15 12/20+9/15 12/4+9/75 84/4+9/15 12/4+63/15 12/28+9/15