Add 42/8 and 15/12
1st number: 5 2/8, 2nd number: 1 3/12
42/8 + 15/12 is 13/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 12 is 24
Next, find the equivalent fraction of both fractional numbers with denominator 24 - For the 1st fraction, since 8 × 3 = 24,
42/8 = 42 × 3/8 × 3 = 126/24 - Likewise, for the 2nd fraction, since 12 × 2 = 24,
15/12 = 15 × 2/12 × 2 = 30/24 - Add the two like fractions:
126/24 + 30/24 = 126 + 30/24 = 156/24 - 156/24 simplified gives 13/2
- So, 42/8 + 15/12 = 13/2
In mixed form: 61/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/8+15/12 42/8+30/12 42/16+15/12 42/8+15/24 42/8+45/12 42/24+15/12 42/8+15/36 42/8+75/12 42/40+15/12 42/8+15/60 42/56+15/12 42/8+15/84