Add 10/21 and 28/4
1st number: 10/21, 2nd number: 7 0/4
10/21 + 28/4 is 157/21.
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,
10/21 = 10 × 4/21 × 4 = 40/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
28/4 = 28 × 21/4 × 21 = 588/84 - Add the two like fractions:
40/84 + 588/84 = 40 + 588/84 = 628/84 - 628/84 simplified gives 157/21
- So, 10/21 + 28/4 = 157/21
In mixed form: 710/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/21+28/4 10/21+56/4 10/42+28/4 10/21+28/8 30/21+28/4 10/21+84/4 10/63+28/4 10/21+28/12 50/21+28/4 10/21+28/20 70/21+28/4