i= 1/(1-n). Which means N= (i-1)/i - How?

Question

I am trying to separate for "N" .. I know the solution, just not how it was achieved.

Any help is appreciated! :)

i= 1/(1-n). Which means N= (i-1)/i 

How was "N" separated?

Answer 1

i = 1/(1 - n)

i(1 - n) = 1

i - in = 1

-in = 1 - i

in = i - 1

n = (i - 1)/i