Add 9/12 and 15/28
9/12 + 15/28 is 9/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 28 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
9/12 = 9 × 7/12 × 7 = 63/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
15/28 = 15 × 3/28 × 3 = 45/84 - Add the two like fractions:
63/84 + 45/84 = 63 + 45/84 = 108/84 - 108/84 simplified gives 9/7
- So, 9/12 + 15/28 = 9/7
In mixed form: 12/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/12+15/28 9/12+30/28 9/24+15/28 9/12+15/56 27/12+15/28 9/12+45/28 9/36+15/28 9/12+15/84 45/12+15/28 9/12+75/28 9/60+15/28 63/12+15/28 9/84+15/28