hot to get actual value when we have inc tax value and percent ?

Inc tax amount = 999

Tax  = 12.5%

Actual value = x

1.       X+(12.5)/100 =999

2.       100x+12.5x/100 =999

3.       112.5x = 99900

4.       X = 99900/112.5

5.       X = 888

Your actual value = 888

Your tax = 999-888 = 111

Short  900*100/(12.5+100)=888

by ankit and abhay