Add 75/12 and 21/9
1st number: 6 3/12, 2nd number: 2 3/9
75/12 + 21/9 is 103/12.
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,
75/12 = 75 × 3/12 × 3 = 225/36 - Likewise, for the 2nd fraction, since 9 × 4 = 36,
21/9 = 21 × 4/9 × 4 = 84/36 - Add the two like fractions:
225/36 + 84/36 = 225 + 84/36 = 309/36 - 309/36 simplified gives 103/12
- So, 75/12 + 21/9 = 103/12
In mixed form: 87/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/12+42/9 75/24+21/9 75/12+21/18 75/12+63/9 75/36+21/9 75/12+21/27 75/60+21/9 75/12+21/45 75/84+21/9 75/12+21/63