7th Grade - Discount and Sales Tax

Today we talked about discounts and sales tax -- which use the same concepts and percentage increase and decrease. The videos below might be helpful.

https://www.khanacademy.org/math/pre-algebra/pre-algebra-ratios-rates/pre-algebra-percent-word-problems/v/solving-percent-problems

https://www.khanacademy.org/math/pre-algebra/pre-algebra-ratios-rates/pre-algebra-percent-word-problems/v/solving-percent-problems-2

https://www.khanacademy.org/math/pre-algebra/pre-algebra-ratios-rates/pre-algebra-percent-word-problems/v/solving-percent-problems-3

Homework: 
Exercise 7.4 (page 174) 
# 1 – 4 and 6 # 5 (a, b)
Note: For this exercise, assume sales tax is 5%