Add 15/4 and 42/12
1st number: 3 3/4, 2nd number: 3 6/12
15/4 + 42/12 is 29/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 12 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 4 × 3 = 12,
15/4 = 15 × 3/4 × 3 = 45/12 - Likewise, for the 2nd fraction, since 12 × 1 = 12,
42/12 = 42 × 1/12 × 1 = 42/12 - Add the two like fractions:
45/12 + 42/12 = 45 + 42/12 = 87/12 - 87/12 simplified gives 29/4
- So, 15/4 + 42/12 = 29/4
In mixed form: 71/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/4+42/12 15/4+84/12 15/8+42/12 15/4+42/24 45/4+42/12 15/12+42/12 15/4+42/36 75/4+42/12 15/20+42/12 15/4+42/60 15/28+42/12 15/4+42/84