Add 27/10 and 9/21
1st number: 2 7/10, 2nd number: 9/21
27/10 + 9/21 is 219/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 10 × 21 = 210,
27/10 = 27 × 21/10 × 21 = 567/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
9/21 = 9 × 10/21 × 10 = 90/210 - Add the two like fractions:
567/210 + 90/210 = 567 + 90/210 = 657/210 - 657/210 simplified gives 219/70
- So, 27/10 + 9/21 = 219/70
In mixed form: 39/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/10+9/21 27/10+18/21 27/20+9/21 27/10+9/42 81/10+9/21 27/10+27/21 27/30+9/21 27/10+9/63 27/10+45/21 27/50+9/21 27/10+63/21 27/70+9/21