Add 28/81 and 75/84
28/81 + 75/84 is 2809/2268.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 84 is 2268
Next, find the equivalent fraction of both fractional numbers with denominator 2268 - For the 1st fraction, since 81 × 28 = 2268,
28/81 = 28 × 28/81 × 28 = 784/2268 - Likewise, for the 2nd fraction, since 84 × 27 = 2268,
75/84 = 75 × 27/84 × 27 = 2025/2268 - Add the two like fractions:
784/2268 + 2025/2268 = 784 + 2025/2268 = 2809/2268 - So, 28/81 + 75/84 = 2809/2268
In mixed form: 1541/2268
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/81+75/84 84/81+75/84