Add 20/21 and 24/9
1st number: 20/21, 2nd number: 2 6/9
20/21 + 24/9 is 76/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
20/21 = 20 × 3/21 × 3 = 60/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
24/9 = 24 × 7/9 × 7 = 168/63 - Add the two like fractions:
60/63 + 168/63 = 60 + 168/63 = 228/63 - 228/63 simplified gives 76/21
- So, 20/21 + 24/9 = 76/21
In mixed form: 313/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/21+24/9 20/21+48/9 20/42+24/9 20/21+24/18 60/21+24/9 20/21+72/9 20/63+24/9 20/21+24/27 20/21+24/45 20/21+24/63