Royal Furniture bought a sofa for $600. The sofa had a $1,510 list price. What was the trade discount rate that Royal received

Royal Furniture bought a sofa for $600. The sofa had a $1,510 list price. What was the trade discount rate that Royal received?

The discount rate is given by:

Discount\ Rate = \frac{Discount}{List\ Price}

So, find the discount first. That should be easy enough to find; just use logic.