Add 10/4 and 7/21
1st number: 2 2/4, 2nd number: 7/21
10/4 + 7/21 is 17/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
10/4 = 10 × 21/4 × 21 = 210/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
7/21 = 7 × 4/21 × 4 = 28/84 - Add the two like fractions:
210/84 + 28/84 = 210 + 28/84 = 238/84 - 238/84 simplified gives 17/6
- So, 10/4 + 7/21 = 17/6
In mixed form: 25/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/4+7/21 10/4+14/21 10/8+7/21 10/4+7/42 30/4+7/21 10/12+7/21 10/4+7/63 50/4+7/21 10/4+35/21 10/20+7/21 70/4+7/21 10/4+49/21 10/28+7/21