Add 21/28 and 6/10
21/28 + 6/10 is 27/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 10 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
21/28 = 21 × 5/28 × 5 = 105/140 - Likewise, for the 2nd fraction, since 10 × 14 = 140,
6/10 = 6 × 14/10 × 14 = 84/140 - Add the two like fractions:
105/140 + 84/140 = 105 + 84/140 = 189/140 - 189/140 simplified gives 27/20
- So, 21/28 + 6/10 = 27/20
In mixed form: 17/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/28+6/10 21/28+12/10 21/56+6/10 21/28+6/20 63/28+6/10 21/28+18/10 21/84+6/10 21/28+6/30 21/28+30/10 21/28+6/50 21/28+42/10 21/28+6/70