A salary was increased by 15% and is now $9936. What was the initial salary?

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Let the original salary be x then the new salary is x(100+15)/100 or 1.15x

1.15 x = 9936

x = 9936/1.15 = 8640

**The original salary is 8640**

You need to use the equation that relates the old salary and the new increased salary such that:

`9936 = s + 15/100*s => 9936 = s + 0.15s`

Factoring out s yields:

`9936 = s(1 + 0.15) => s = 9936/1.15 => s = 8640`

**Hence, evaluatingthe initial salary, before being increased, yields `s = $8640` .**

8640

9936 is the increased salary and was increased by 15% means 115%. In value it is 1.15. Use this formulae Cost price x multiplier = Sale Price

Now put values.

X= 9936/1.15

X=8640

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