Frank’s bookshelf is 1 1/2 meters high. Each row in the bookshelf is 3/16 of a meter high. How many rows are there in Frank’s bookshelf? A.
3
B.
6
C.
8
D.
12

Can someone show me the steps to solve the problem?

If 20% of a number is 35, what is 50% of that number?

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?