Percentage Discount given an Original Price of $29 and a Sale Price of $20.30

Discount Rate = 1 –  
Discount Rate = 1 – 0.7
Discount Rate = 0.3
0.3 Converted to a Percent: 0.3 = 30%
Percentage Discount given an Original Price of $29 and a Sale Price of $20.30 = 30%
Note: Reduction in Price = $29 – $20.30 = $8.70