Question

Mandana is ordering new tile for her kitchen floor. The area of the floor is 118.8 square feet, and she wants to order between 15% and 20% extra of the materials. Which of the following is a reasonable amount of tile for Mandana to order?

Answer 1

so she needs 100 percent of the materials first to cover the area and an additional 15 to 20 percent so you have 115 % = 1.15 and 120% = 1.20 and then you need the total which means 118.8*1.15 and 1.20*118.8 to give you the two values of the range that is reasonable for her to order.