How to do calculations inside of array?

Hi dear community, and especially array lovers. Please help to understand how to do it.

I have simple array: Name; Clients; Max clients.

The job is to transform this array into Name; Load %. In other words, I have to do simple math like
Clients*100/max clients, and then map it in the array.

I did it with the help of iterator-aggregator, but i have to do it with “set variable” module and formula. Is it possible?

Thank you!