Add 42/12 and 15/8
1st number: 3 6/12, 2nd number: 1 7/8
42/12 + 15/8 is 43/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 8 is 24
Next, find the equivalent fraction of both fractional numbers with denominator 24 - For the 1st fraction, since 12 × 2 = 24,
42/12 = 42 × 2/12 × 2 = 84/24 - Likewise, for the 2nd fraction, since 8 × 3 = 24,
15/8 = 15 × 3/8 × 3 = 45/24 - Add the two like fractions:
84/24 + 45/24 = 84 + 45/24 = 129/24 - 129/24 simplified gives 43/8
- So, 42/12 + 15/8 = 43/8
In mixed form: 53/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/12+15/8 42/12+30/8 42/24+15/8 42/12+15/16 42/12+45/8 42/36+15/8 42/12+15/24 42/12+75/8 42/60+15/8 42/12+15/40 42/84+15/8 42/12+15/56