Percentage Discount given an Original Price of $1,165 and a Sale Price of $990.25

Discount Rate = 1 –  
Discount Rate = 1 – 0.85
Discount Rate = 0.15
0.15 Converted to a Percent: 0.15 = 15%
Percentage Discount given an Original Price of $1,165 and a Sale Price of $990.25 = 15%
Note: Reduction in Price = $1,165 – $990.25 = $174.75