Add 81/5 and 7/9
1st number: 16 1/5, 2nd number: 7/9
81/5 + 7/9 is 764/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 9 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 5 × 9 = 45,
81/5 = 81 × 9/5 × 9 = 729/45 - Likewise, for the 2nd fraction, since 9 × 5 = 45,
7/9 = 7 × 5/9 × 5 = 35/45 - Add the two like fractions:
729/45 + 35/45 = 729 + 35/45 = 764/45 - So, 81/5 + 7/9 = 764/45
In mixed form: 1644/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/5+14/9 81/10+7/9 81/5+7/18 81/5+21/9 81/15+7/9 81/5+7/27 81/5+35/9 81/25+7/9 81/5+7/45 81/5+49/9 81/35+7/9 81/5+7/63