Add 84/27 and 21/80
1st number: 3 3/27, 2nd number: 21/80
84/27 + 21/80 is 2429/720.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 80 is 2160
Next, find the equivalent fraction of both fractional numbers with denominator 2160 - For the 1st fraction, since 27 × 80 = 2160,
84/27 = 84 × 80/27 × 80 = 6720/2160 - Likewise, for the 2nd fraction, since 80 × 27 = 2160,
21/80 = 21 × 27/80 × 27 = 567/2160 - Add the two like fractions:
6720/2160 + 567/2160 = 6720 + 567/2160 = 7287/2160 - 7287/2160 simplified gives 2429/720
- So, 84/27 + 21/80 = 2429/720
In mixed form: 3269/720
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/27+42/80 84/54+21/80 84/27+63/80 84/81+21/80