Add 9/21 and 81/10
1st number: 9/21, 2nd number: 8 1/10
9/21 + 81/10 is 597/70.
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,
9/21 = 9 × 10/21 × 10 = 90/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
81/10 = 81 × 21/10 × 21 = 1701/210 - Add the two like fractions:
90/210 + 1701/210 = 90 + 1701/210 = 1791/210 - 1791/210 simplified gives 597/70
- So, 9/21 + 81/10 = 597/70
In mixed form: 837/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/21+81/10 9/42+81/10 9/21+81/20 27/21+81/10 9/63+81/10 9/21+81/30 45/21+81/10 9/21+81/50 63/21+81/10 9/21+81/70