Add 84/21 and 27/80
1st number: 4 0/21, 2nd number: 27/80
84/21 + 27/80 is 347/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 21 × 80 = 1680,
84/21 = 84 × 80/21 × 80 = 6720/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
27/80 = 27 × 21/80 × 21 = 567/1680 - Add the two like fractions:
6720/1680 + 567/1680 = 6720 + 567/1680 = 7287/1680 - 7287/1680 simplified gives 347/80
- So, 84/21 + 27/80 = 347/80
In mixed form: 427/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/21+54/80 84/42+27/80 84/21+81/80 84/63+27/80