Add 12/3 and 42/7
1st number: 4 0/3, 2nd number: 6 0/7
12/3 + 42/7 is 10/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 7 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 3 × 7 = 21,
12/3 = 12 × 7/3 × 7 = 84/21 - Likewise, for the 2nd fraction, since 7 × 3 = 21,
42/7 = 42 × 3/7 × 3 = 126/21 - Add the two like fractions:
84/21 + 126/21 = 84 + 126/21 = 210/21 - 210/21 simplified gives 10/1
- So, 12/3 + 42/7 = 10/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/3+42/7 12/3+84/7 12/6+42/7 12/3+42/14 36/3+42/7 12/9+42/7 12/3+42/21 60/3+42/7 12/15+42/7 12/3+42/35 84/3+42/7 12/21+42/7 12/3+42/49