# [SOLVED] Get original amount added by percentage

• Dec 3rd 2007, 11:51 PM
nabilpk
[SOLVED] Get original amount added by percentage
Take 10% of 10. Result will be 1. Now add 1 in 10. Result will be 11.

For example I have only amount 11 and 10% available. I want the original amount that is 10. How can I get this? Any formula?????
• Dec 3rd 2007, 11:58 PM
janvdl
Quote:

Originally Posted by nabilpk
Take 10% of 10. Result will be 1. Now add 1 in 10. Result will be 11.

For example I have only amount 11 and 10% available. I want the original amount that is 10. How can I get this? Any formula?????

For this we use cross-multiplication.

You know that 11 = 100% + 10%

So 11 = 110%
And $x$ = 100%

$\frac{11}{x} = \frac{110}{100}$

Solve for $x$