Add 81/3 and 21/84
1st number: 27 0/3, 2nd number: 21/84
81/3 + 21/84 is 109/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 3 × 28 = 84,
81/3 = 81 × 28/3 × 28 = 2268/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
21/84 = 21 × 1/84 × 1 = 21/84 - Add the two like fractions:
2268/84 + 21/84 = 2268 + 21/84 = 2289/84 - 2289/84 simplified gives 109/4
- So, 81/3 + 21/84 = 109/4
In mixed form: 271/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/3+42/84 81/6+21/84 81/3+63/84 81/9+21/84 81/15+21/84 81/21+21/84