OK, let me see if I understand you. You need to result for A:

A=(0,0083)/0.90 is this correct?

Are you saying that the # that you use to calculate A varies by rows and
columns for each cell? Let's clarify this before going any further.


"Edd" wrote:

Who can help me?

10%= (A-0,0083)/A

10% is the input
-0,0083 is refering to a cel (and is not static, but varies per cel)
A is de output and needs refer to a specific cel.

Thanks in advance