Add 6/21 and 81/70
1st number: 6/21, 2nd number: 1 11/70
6/21 + 81/70 is 101/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 70 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 70 × 3 = 210,
81/70 = 81 × 3/70 × 3 = 243/210 - Add the two like fractions:
60/210 + 243/210 = 60 + 243/210 = 303/210 - 303/210 simplified gives 101/70
- So, 6/21 + 81/70 = 101/70
In mixed form: 131/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/21+81/70 6/42+81/70 18/21+81/70 6/63+81/70 30/21+81/70 42/21+81/70