Question

Jackson has a loyalty card good for a 20% discount at his local hardware store. If the total cost, before tax and discount, of all the items he wants to buy is cc, which expression represents the cost after the discount?
Answer

Answer 1

To find the cost after applying a 20% discount to the total cost \( cc \), you first determine what 20% of \( cc \) is, and then subtract that amount from \( cc \).

1. Calculate the amount of the discount:
\[
\text{Discount} = 0.20 \times cc
\]

2. Subtract the discount from the original cost:
\[
\text{Cost after discount} = cc - (0.20 \times cc)
\]

3. This can be simplified:
\[
\text{Cost after discount} = cc \times (1 - 0.20) = cc \times 0.80
\]

So, the expression that represents the cost after the discount is:
\[
0.80cc
\]