Answer: 36% of Polly's co-workers tea over coffee.
Explanation:
Given : Fraction of Polly's co-workers prefer tea over coffee=
![(9)/(25)](https://img.qammunity.org/2019/formulas/mathematics/middle-school/54vel9xklcutx3nw931232x47s1zxpuz35.png)
As we know that to convert fraction into percent we multiply it by 100.
Then, the percent of Polly's co-workers tea over coffee will be :_
![(9)/(25)*100\%=9*4\%=36\%](https://img.qammunity.org/2019/formulas/mathematics/middle-school/osu63bfcejt3ppbzt27xuqelqeef3x7fn3.png)
Therefore, 36% of Polly's co-workers tea over coffee.