Percentage Discount given an Original Price of $80 and a Sale Price of $60

Discount Rate = 1 –  
Discount Rate = 1 – 0.75
Discount Rate = 0.25
0.25 Converted to a Percent: 0.25 = 25%
Percentage Discount given an Original Price of $80 and a Sale Price of $60 = 25%
Note: Reduction in Price = $80 – $60 = $20