Add 45/12 and 28/15
1st number: 3 9/12, 2nd number: 1 13/15
45/12 + 28/15 is 337/60.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
45/12 = 45 × 5/12 × 5 = 225/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
28/15 = 28 × 4/15 × 4 = 112/60 - Add the two like fractions:
225/60 + 112/60 = 225 + 112/60 = 337/60 - So, 45/12 + 28/15 = 337/60
In mixed form: 537/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12+28/15 45/12+56/15 45/24+28/15 45/12+28/30 45/12+84/15 45/36+28/15 45/12+28/45 45/60+28/15 45/12+28/75 45/84+28/15