Whats the percentage of inmates pled guilty

Question

A study was conducted of pleas made by 1,028 criminals. Among those criminals, 957 pled guilty, and 397 of them were sentenced to prison. Among the 71 other criminals, who pled not guilty, 54 were sent to prison.

a. What percentage of the criminals pled guilty?

Answer 1

Not sure if there's more to this problem. If 957 of 1028 criminals pled guilty, - that answers question a:

957/1028 = 0.93 ==> 93%