Add 27/9 and 8/21
1st number: 3 0/9, 2nd number: 8/21
27/9 + 8/21 is 71/21.
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,
8/21 = 8 × 3/21 × 3 = 24/63 - Add the two like fractions:
189/63 + 24/63 = 189 + 24/63 = 213/63 - 213/63 simplified gives 71/21
- So, 27/9 + 8/21 = 71/21
In mixed form: 38/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/9+8/21 27/9+16/21 27/18+8/21 27/9+8/42 81/9+8/21 27/9+24/21 27/9+8/63 27/9+40/21 27/45+8/21 27/9+56/21 27/63+8/21