1) miss kelley and mr. peabody have 25 and 36 children in their classrooms, respectively.
the ratio of boys to girls in miss kelley's classroom is 3: 2 and the ratio of girls to all the
children in mr. peabody's classroom is 1: 3. if the two classes are combined, what is the
ratio of girls to boys?

2) an item was marked up 25% and then this price was marked down 20%. what is the net
effect of these two markings?