Add 28/12 and 18/15
1st number: 2 4/12, 2nd number: 1 3/15
28/12 + 18/15 is 53/15.
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,
28/12 = 28 × 5/12 × 5 = 140/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
18/15 = 18 × 4/15 × 4 = 72/60 - Add the two like fractions:
140/60 + 72/60 = 140 + 72/60 = 212/60 - 212/60 simplified gives 53/15
- So, 28/12 + 18/15 = 53/15
In mixed form: 38/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/12+18/15 28/12+36/15 28/24+18/15 28/12+18/30 84/12+18/15 28/12+54/15 28/36+18/15 28/12+18/45 28/12+90/15 28/60+18/15 28/12+18/75 28/84+18/15