Answer:
86.67%.
Explanation:
We have been given that the insurance company pays the full cost of 3,900 prescriptions claims out of 4,500 prescriptions claims submitted.
To solve our given problem, we need to find 3,900 is what percent of 4,500.
![\text{Percent of the claims paid}=(3,900)/(4,500)* 100](https://img.qammunity.org/2019/formulas/mathematics/middle-school/i2npi1nu6e7swsz266i72alkggy2h1i1cb.png)
![\text{Percent of the claims paid}=0.8666666* 100](https://img.qammunity.org/2019/formulas/mathematics/middle-school/yud58kngk5jiqs44zk1r7jkidh5s8fnajl.png)
![\text{Percent of the claims paid}=86.66666\%](https://img.qammunity.org/2019/formulas/mathematics/middle-school/ddjcylrwhgijw4n0c8sr1p5yg61ywabppr.png)
![\text{Percent of the claims paid}=86.67\%](https://img.qammunity.org/2019/formulas/mathematics/middle-school/m3qzry11td0gdhex6veytekmt7i5ka8cho.png)
Therefore, the rate of the claims paid expressed as a percent would be 86.67%.