Add 7/12 and 42/9
1st number: 7/12, 2nd number: 4 6/9
7/12 + 42/9 is 21/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 9 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 12 × 3 = 36,
7/12 = 7 × 3/12 × 3 = 21/36 - Likewise, for the 2nd fraction, since 9 × 4 = 36,
42/9 = 42 × 4/9 × 4 = 168/36 - Add the two like fractions:
21/36 + 168/36 = 21 + 168/36 = 189/36 - 189/36 simplified gives 21/4
- So, 7/12 + 42/9 = 21/4
In mixed form: 51/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/12+42/9 7/12+84/9 7/24+42/9 7/12+42/18 21/12+42/9 7/36+42/9 7/12+42/27 35/12+42/9 7/60+42/9 7/12+42/45 49/12+42/9 7/84+42/9 7/12+42/63