Add 6/21 and 21/4
1st number: 6/21, 2nd number: 5 1/4
6/21 + 21/4 is 155/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
6/21 = 6 × 4/21 × 4 = 24/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
21/4 = 21 × 21/4 × 21 = 441/84 - Add the two like fractions:
24/84 + 441/84 = 24 + 441/84 = 465/84 - 465/84 simplified gives 155/28
- So, 6/21 + 21/4 = 155/28
In mixed form: 515/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/21+21/4 6/21+42/4 6/42+21/4 6/21+21/8 18/21+21/4 6/21+63/4 6/63+21/4 6/21+21/12 30/21+21/4 6/21+21/20 42/21+21/4 6/21+21/28