Add 6/21 and 84/54
1st number: 6/21, 2nd number: 1 30/54
6/21 + 84/54 is 116/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 21 × 18 = 378,
6/21 = 6 × 18/21 × 18 = 108/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
84/54 = 84 × 7/54 × 7 = 588/378 - Add the two like fractions:
108/378 + 588/378 = 108 + 588/378 = 696/378 - 696/378 simplified gives 116/63
- So, 6/21 + 84/54 = 116/63
In mixed form: 153/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/21+84/54 6/42+84/54 18/21+84/54 6/63+84/54 30/21+84/54 42/21+84/54