Answer:
5/9
Explanation:
10/18
The factors of 10 are 2 5 10 and 1, the factors of 18 are 9 2 6 3 18 and 1
To get simplest form, you take the greatest shared factor and divide both by it. the largest number they share are 2, thus you divide both numbers by 2, and as they don't have any more factors, it is 5/9