Add 24/21 and 81/70
1st number: 1 3/21, 2nd number: 1 11/70
24/21 + 81/70 is 23/10.
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,
24/21 = 24 × 10/21 × 10 = 240/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
81/70 = 81 × 3/70 × 3 = 243/210 - Add the two like fractions:
240/210 + 243/210 = 240 + 243/210 = 483/210 - 483/210 simplified gives 23/10
- So, 24/21 + 81/70 = 23/10
In mixed form: 23/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/21+81/70 24/42+81/70 72/21+81/70 24/63+81/70