The list price of a massaging chair is $450. the net price to the retailer is $391.50. what is the trade-discount rate? *

The list price of the massaging chair is 450 dollars. Now, the net price of the retailer is 391.50.
Let's find our the trade discount rate.
=> 391.50 dollars / 450 dollars = 0.87 * 100% = 87%
=> 100% - 87% = 13% is the trade discount of the retailer.