Igebra 1: CC 2015 > Chapter 1: Rewriting Equations and Formulas > Section Exercises 1.5 > Exercise 33
The sale price S (in dollars) of an item is given by the formula S= L-IL, where L is the
list price in dollars) and r is the discount rate (in decimal form).
a. Solve the formula for r.
Sale price
$18
b. The list price of the shirt is $30. What is the discount rate?
33
The discount rate is