Add 81/7 and 6/9
1st number: 11 4/7, 2nd number: 6/9
81/7 + 6/9 is 257/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 7 × 9 = 63,
81/7 = 81 × 9/7 × 9 = 729/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
6/9 = 6 × 7/9 × 7 = 42/63 - Add the two like fractions:
729/63 + 42/63 = 729 + 42/63 = 771/63 - 771/63 simplified gives 257/21
- So, 81/7 + 6/9 = 257/21
In mixed form: 125/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/7+12/9 81/14+6/9 81/7+6/18 81/7+18/9 81/21+6/9 81/7+6/27 81/7+30/9 81/35+6/9 81/7+6/45 81/7+42/9 81/49+6/9 81/7+6/63