Add 7/9 and 42/12
1st number: 7/9, 2nd number: 3 6/12
7/9 + 42/12 is 77/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 12 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 9 × 4 = 36,
7/9 = 7 × 4/9 × 4 = 28/36 - Likewise, for the 2nd fraction, since 12 × 3 = 36,
42/12 = 42 × 3/12 × 3 = 126/36 - Add the two like fractions:
28/36 + 126/36 = 28 + 126/36 = 154/36 - 154/36 simplified gives 77/18
- So, 7/9 + 42/12 = 77/18
In mixed form: 45/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/9+42/12 7/9+84/12 7/18+42/12 7/9+42/24 21/9+42/12 7/27+42/12 7/9+42/36 35/9+42/12 7/45+42/12 7/9+42/60 49/9+42/12 7/63+42/12 7/9+42/84