Question

A computer company gives a discount of 10 % on a new piece of software. If it makes a profit of 7%, what percent does the marked price exceed the cost price?

Answer 1

let marked price is y and cost price=x.
y*90/100 =x*107/100;
y/x=107/90
(y-x)/x=17/90;
y-x 170
----*100% =------% =18.89%
x 9