Add 18/3 and 42/12
1st number: 6 0/3, 2nd number: 3 6/12
18/3 + 42/12 is 19/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 12 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 3 × 4 = 12,
18/3 = 18 × 4/3 × 4 = 72/12 - Likewise, for the 2nd fraction, since 12 × 1 = 12,
42/12 = 42 × 1/12 × 1 = 42/12 - Add the two like fractions:
72/12 + 42/12 = 72 + 42/12 = 114/12 - 114/12 simplified gives 19/2
- So, 18/3 + 42/12 = 19/2
In mixed form: 91/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/3+42/12 18/3+84/12 18/6+42/12 18/3+42/24 54/3+42/12 18/9+42/12 18/3+42/36 90/3+42/12 18/15+42/12 18/3+42/60 18/21+42/12 18/3+42/84