A discount of 20 percent on an order of goods

BTGmoderatorLU wrote:A discount of 20 percent on an order good followed by a discount of 20 percent amounts to

A. The same as one 45 percent discount
B. The same as one 40 percent discount
C. The same as one 36 percent discount
D. The same as one 30 percent discount
E. The same as one 25 percent discount

Let's start with a nice number

Let $100 be the ORIGINAL price.
So, a 20% discount on $100 = $20, which means the discounted price = $100 - $20 = $80

Next, a 20% discount on $80 = $16, which means the NEW discounted price = $80- $16 = $64

So, if the ORIGINAL price = $100, the DOUBLE DISCOUNTED price = $64
In other words, the DOUBLE DISCOUNTED price is $36 less than the ORIGINAL PRICE

This represents an overall discount of 36%

Answer: C

Cheers,
Brent