Add 3/9 and 81/7
1st number: 3/9, 2nd number: 11 4/7
3/9 + 81/7 is 250/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 7 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 9 × 7 = 63,
3/9 = 3 × 7/9 × 7 = 21/63 - Likewise, for the 2nd fraction, since 7 × 9 = 63,
81/7 = 81 × 9/7 × 9 = 729/63 - Add the two like fractions:
21/63 + 729/63 = 21 + 729/63 = 750/63 - 750/63 simplified gives 250/21
- So, 3/9 + 81/7 = 250/21
In mixed form: 1119/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/9+81/7 3/18+81/7 3/9+81/14 3/27+81/7 3/9+81/21 15/9+81/7 3/45+81/7 3/9+81/35 21/9+81/7 3/63+81/7 3/9+81/49