Add 3/15 and 42/12
1st number: 3/15, 2nd number: 3 6/12
3/15 + 42/12 is 37/10.
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,
3/15 = 3 × 4/15 × 4 = 12/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
42/12 = 42 × 5/12 × 5 = 210/60 - Add the two like fractions:
12/60 + 210/60 = 12 + 210/60 = 222/60 - 222/60 simplified gives 37/10
- So, 3/15 + 42/12 = 37/10
In mixed form: 37/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/15+42/12 3/15+84/12 3/30+42/12 3/15+42/24 9/15+42/12 3/45+42/12 3/15+42/36 3/75+42/12 3/15+42/60 21/15+42/12 3/15+42/84