Percentage Discount given an Original Price of $240 and a Sale Price of $192

Discount Rate = 1 –  
Discount Rate = 1 – 0.8
Discount Rate = 0.2
0.2 Converted to a Percent: 0.2 = 20%
Percentage Discount given an Original Price of $240 and a Sale Price of $192 = 20%
Note: Reduction in Price = $240 – $192 = $48