Question

What is constant percentage?

Answer 1

Constant percentage may be translated to a growth factor.

Explanation:

Say something grows with a constant percentage of 10% every period, we may say that the growth factor `g=1.10`
This means that after `t` periods, the something has grown to `g^t=1.10^t` its original value (as in compounded interest).

If something dimished with a a constant percentage of say 10% every period, this means that the growth factor is `0.90`, and after `t` periods only `0.90^t` of it is left.

You can rework these results to total percentage by multiplying by `100%`