Add 10/4 and 21/7
1st number: 2 2/4, 2nd number: 3 0/7
10/4 + 21/7 is 11/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 7 is 28
Next, find the equivalent fraction of both fractional numbers with denominator 28 - For the 1st fraction, since 4 × 7 = 28,
10/4 = 10 × 7/4 × 7 = 70/28 - Likewise, for the 2nd fraction, since 7 × 4 = 28,
21/7 = 21 × 4/7 × 4 = 84/28 - Add the two like fractions:
70/28 + 84/28 = 70 + 84/28 = 154/28 - 154/28 simplified gives 11/2
- So, 10/4 + 21/7 = 11/2
In mixed form: 51/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/4+21/7 10/4+42/7 10/8+21/7 10/4+21/14 30/4+21/7 10/4+63/7 10/12+21/7 50/4+21/7 10/20+21/7 10/4+21/35 70/4+21/7 10/28+21/7 10/4+21/49