# Thread: Percentages and prices.

A watch was sold at a loss of 10%. If it was sold for $10 more, there would have been a gain of 10%. Find out how much the watch was for. Answer is 55 2. ## Re: Problem Originally Posted by Numzilla A watch was sold at a loss of 10%. If it was sold for$10 more, there would have been a gain of 10%. Find out how much the watch was for.

Answer is 55
Call S the selling price and C the cost price.

Since it was sold at a loss of 10%, that means S = 0.9C (why?)

If it was sold for \$10 more, there would have been a gain of 10%. So S + 10 = 1.1C (why?)

Solve these two equations simultaneously.