Percentage Discount given an Original Price of $65 and a Sale Price of $50

Discount Rate = 1 –  
Discount Rate = 1 – 0.7692
Discount Rate = 0.2308
0.2308 Converted to a Percent: 0.2308 = 23.08%
Percentage Discount given an Original Price of $65 and a Sale Price of $50 = 23.08%
Note: Reduction in Price = $65 – $50 = $15