Add 72/18 and 7/9
1st number: 4 0/18, 2nd number: 7/9
72/18 + 7/9 is 43/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 9 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 18 × 1 = 18,
72/18 = 72 × 1/18 × 1 = 72/18 - Likewise, for the 2nd fraction, since 9 × 2 = 18,
7/9 = 7 × 2/9 × 2 = 14/18 - Add the two like fractions:
72/18 + 14/18 = 72 + 14/18 = 86/18 - 86/18 simplified gives 43/9
- So, 72/18 + 7/9 = 43/9
In mixed form: 47/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/18+14/9 72/36+7/9 72/18+7/18 72/18+21/9 72/54+7/9 72/18+7/27 72/18+35/9 72/90+7/9 72/18+7/45 72/18+49/9 72/18+7/63