Add 28/12 and 81/28
1st number: 2 4/12, 2nd number: 2 25/28
28/12 + 81/28 is 439/84.
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,
28/12 = 28 × 7/12 × 7 = 196/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
81/28 = 81 × 3/28 × 3 = 243/84 - Add the two like fractions:
196/84 + 243/84 = 196 + 243/84 = 439/84 - So, 28/12 + 81/28 = 439/84
In mixed form: 519/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/12+81/28 28/24+81/28 28/12+81/56 84/12+81/28 28/36+81/28 28/12+81/84 28/60+81/28 28/84+81/28