Add 27/9 and 24/21
1st number: 3 0/9, 2nd number: 1 3/21
27/9 + 24/21 is 29/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 21 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 9 × 7 = 63,
27/9 = 27 × 7/9 × 7 = 189/63 - Likewise, for the 2nd fraction, since 21 × 3 = 63,
24/21 = 24 × 3/21 × 3 = 72/63 - Add the two like fractions:
189/63 + 72/63 = 189 + 72/63 = 261/63 - 261/63 simplified gives 29/7
- So, 27/9 + 24/21 = 29/7
In mixed form: 41/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/9+24/21 27/9+48/21 27/18+24/21 27/9+24/42 81/9+24/21 27/9+72/21 27/9+24/63 27/45+24/21 27/63+24/21