Question: how to find percentage of par value?
Answer: Multiply the bond's coupon rate by its par value to determine its annual interest. In this example, multiply 5 percent, or 0.05, by $1,000 to get $50 in annual interest. Divide the bond's annual interest by its price to convert the price to a yield. In this example, divide $50 by $1,048.90 to get 0.0477.