From the way you have it written, I'm not sure what you mean. Do you mean:
([13-b]/64)(2-.5b)?
Please repost with information give more clearly.
I hope this helps a little. Thanks for asking.
Okay i don't know how to do this?
13-b 2- 0.5b
------ ---------
6 4
How do i solve ths proportion?
2 answers
the answer is 40