Add 6/21 and 9/10
6/21 + 9/10 is 83/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
6/21 = 6 × 10/21 × 10 = 60/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
9/10 = 9 × 21/10 × 21 = 189/210 - Add the two like fractions:
60/210 + 189/210 = 60 + 189/210 = 249/210 - 249/210 simplified gives 83/70
- So, 6/21 + 9/10 = 83/70
In mixed form: 113/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/21+9/10 6/21+18/10 6/42+9/10 6/21+9/20 18/21+9/10 6/21+27/10 6/63+9/10 6/21+9/30 30/21+9/10 6/21+45/10 6/21+9/50 42/21+9/10 6/21+63/10 6/21+9/70