With a coupon you can get a pair os shoes that normally costs $84 for only $72 what percentage was the discount

Given parameters:

Original selling price = $84

Discounted Selling price  = $72

Unknown:

Percentage discount = ?

Solution:

To find the percentage discount;

Discount = Original selling price  - Discounted selling price

               = $84 - $72

               = $12

Now,

  Percentage discount  =   = 14.3%

The percentage discount is 14.3%

the discriminant is 64 + 4*1*12 = 112

this is prime.

step-by-step explanation: