A computer company gives a discount of 10% on a new piece of software. If it makes a profit of 9%, what percent does the marked price exceed the cost price?

Question

unklerhaukus · Answer

marked price = 100%

anonymous · Answer

original price=o

o(1+.09)*(.9)=

unklerhaukus · Answer

marked price - discount =paid price 
paid price = profit+cost price

unklerhaukus · Answer

marked price - cost price = ?

anonymous · Answer

Well if the marked price was 100, minus 10% it would be $90.
I get that part, but after that I'm lost.

unklerhaukus · Answer

so 90%=profit +cost price

profit =9%

unklerhaukus · Answer

what is the cost price?

anonymous · Answer

The question itself doesn't have one, but I figured we'd use $100

unklerhaukus · Answer

try that bit again

anonymous · Answer

THis is where I get confused. But if we go by the work, then $10?

unklerhaukus · Answer

how did you get 10?

anonymous · Answer

90/9 but for some reason I keep thinking it should be the other way around...

unklerhaukus · Answer

90%=profit +cost price
90%-profit =cost price
profit =9%
cost price=?

anonymous · Answer

81

anonymous · Answer

-Makes a note.- Never do this on 2 hours of sleep.

unklerhaukus · Answer

the question is asking for this quantity 
marked price - cost price =

anonymous · Answer

100-81 = 19

unklerhaukus · Answer

$$\Huge\color{red}\checkmark$$

unklerhaukus · Answer

this is the mark up

anonymous · Answer

Okay. I think I halfway get it now.