How do I add already subtracted % to a number?

I have this example:

7850 and 40% has already been subtracted. I need to backtrack and add it back to the number. How do I do that?

2010-01-16T14:39:12Z

Alright, got it thanks! :)

?2010-01-16T14:36:08Z

Favorite Answer

If 40% was already subtracted, then that means that 7850 was 60% of the original number. You can figure out what number 7850 is 60% of by dividing 7850/60%, which gives you the original number.

Stam2010-01-16T22:35:16Z

if you first have x then
x-0,4*x=7850
x=13083,33