Percentage Discount given an Original Price of $70 and a Sale Price of $48

Discount Rate = 1 –  
Discount Rate = 1 – 0.6857
Discount Rate = 0.3143
0.3143 Converted to a Percent: 0.3143 = 31.43%
Percentage Discount given an Original Price of $70 and a Sale Price of $48 = 31.43%
Note: Reduction in Price = $70 – $48 = $22