A refrigerator is on sale for 20% off the original price. A store-wide sale results in an additional reduction of 25%. What is the total discount based on the original price?

Question: A refrigerator is on sale for 20% off the original price. A store-wide sale results in an additional reduction of 25%. What is the total discount based on the original price?

Solution:
Let
x = original price.

First discount:
x(1 - 0.20)
= 0.80x (sale price).

Second discount:
0.80x(1 - 0.25)
= 0.60x (final sale price)

Therefore, the final price is 60% of the original price.
∴ the total discount = 1 - 0.60 = 0.40
∴ % total discount = 40%