Add 28/21 and 84/14
1st number: 1 7/21, 2nd number: 6 0/14
28/21 + 84/14 is 22/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 14 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
28/21 = 28 × 2/21 × 2 = 56/42 - Likewise, for the 2nd fraction, since 14 × 3 = 42,
84/14 = 84 × 3/14 × 3 = 252/42 - Add the two like fractions:
56/42 + 252/42 = 56 + 252/42 = 308/42 - 308/42 simplified gives 22/3
- So, 28/21 + 84/14 = 22/3
In mixed form: 71/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/21+84/14 28/42+84/14 28/21+84/28 84/21+84/14 28/63+84/14 28/21+84/42 28/21+84/70 28/21+84/98