When Sandy goes to the store to buy a t-shirt, she discovers there is a 15% discount on all purchases. Which statement below correctly describes how to find the price of the t-shirt with the discount?
Group of answer choices
a : Add 15% to 100%, convert the sum to a decimal value, and multiply the normal t-shirt price by the decimal value.

b : Subtract 15% from 100%, convert the difference to a decimal value, and multiply the normal t-shirt price by the decimal value.
c : Convert 15% to a decimal value and multiply the decimal value by the normal t-shirt price.
d : Convert 15% to a decimal value and subtract the decimal value from the normal t-shirt price.