Sheet # 88 Critical Thinking

Name: _____________________ Date_____________

If the width of a rectangle is increased by 10% and the length is decreased by 20%, by what percent does the area decrease or increase?

Answers for sheet # 88

Length of the rectangle: a

Width of the rectangle: b

Area = ab

Length has been increased by 10%.

New length = a + 0.1a = 1.1a

New width = b - 0.2b = 0.8b

**Area of the new rectangle = 1.1a x 0.8b = 0.88 ab
The area of the new rectangel decreases by 12%. 1.00 - 0.88 = .12 = 12%
**