Percentage questioon

[uniden32]

I have a formula question regarding how to come up with an original number before 10% was subtracted from it ...

Let's say 630 is my number, I need to know what that number was prior to 10% of it being subtracted from it would have been, in this example: 700.

I'd imagine there should be an algebreic formula for this, I'm just not coming up with it at the moment.

Thanks in advance.

 

[Joe4]

Let's say that you have the following values in the following cells:
A1: 630
B1: 10%

Your formula to get to 700 woulds be:
=A1/(1-B1)

 

[Barbara Excel]

Hi the math behind this is

630 is 90% of the original value
Divide the 630 by 90 then multiply by 100
this can easily then be entered into Excel referencing your relevant cells.

hope that helps
Barbara Excel