Add 42/12 and 9/3
1st number: 3 6/12, 2nd number: 3 0/3
42/12 + 9/3 is 13/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 3 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 12 × 1 = 12,
42/12 = 42 × 1/12 × 1 = 42/12 - Likewise, for the 2nd fraction, since 3 × 4 = 12,
9/3 = 9 × 4/3 × 4 = 36/12 - Add the two like fractions:
42/12 + 36/12 = 42 + 36/12 = 78/12 - 78/12 simplified gives 13/2
- So, 42/12 + 9/3 = 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: 84/12+9/3 42/12+18/3 42/24+9/3 42/12+9/6 42/12+27/3 42/36+9/3 42/12+45/3 42/60+9/3 42/12+9/15 42/12+63/3 42/84+9/3 42/12+9/21