A website is selling calculators for $64. The site got the calculators at a cost of $50. What is the mark-up percentage?

what is it as a %

Arectangle has a base of 5 inches and a height of 7 inches. if the dimensions are cut in half, what will happen to the area of the rectangle? it will be half of the original size. it will be the same as the original size. it will be four times the original size. it will be one-fourth the original size.