The price of a wedding gown was decreased by . How many percent should the new price be increased so that the gown costs as much as before the discount?
The price of the book was increased by złotys which is of the initial price. Then it was increased by another złotys. By how many percent did the overall price of the book increase?
Two circles are given. The radius of the first circle is by longer than the radius of the other circle. It means that the area of the first circle is bigger than the area of the second one