At a football stadium, 20% of the fans in attendance were teenagers. If there were 240 teenagers at the football stadium, what was the total number of people at the stadium?

Does anyone know how to do geometryme with this problem

Atheater wants to build movable steps that they can use to go on and off the stage. they want the steps to have enough space inside so they can also be used to store props. how much space is inside the steps?

How many square centimeters of wrapping paper will be used to wrap the shoe box?