Percentage Discount given an Original Price of $600 and a Sale Price of $150

Discount Rate = 1 –  
Discount Rate = 1 – 0.25
Discount Rate = 0.75
0.75 Converted to a Percent: 0.75 = 75%
Percentage Discount given an Original Price of $600 and a Sale Price of $150 = 75%
Note: Reduction in Price = $600 – $150 = $450