Add 21/15 and 48/12
1st number: 1 6/15, 2nd number: 4 0/12
21/15 + 48/12 is 27/5.
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,
21/15 = 21 × 4/15 × 4 = 84/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
48/12 = 48 × 5/12 × 5 = 240/60 - Add the two like fractions:
84/60 + 240/60 = 84 + 240/60 = 324/60 - 324/60 simplified gives 27/5
- So, 21/15 + 48/12 = 27/5
In mixed form: 52/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/15+48/12 21/15+96/12 21/30+48/12 21/15+48/24 63/15+48/12 21/45+48/12 21/15+48/36 21/75+48/12 21/15+48/60 21/15+48/84