Question

1. original price of concert tickets: $100.00 discount: 21%

Explanation:

Step1: Find the discount amount

To find the discount amount, we calculate 21% of $100. The formula for finding a percentage of a number is $ \text{Discount Amount} = \text{Original Price} \times \text{Discount Rate} $. So, $ 100 \times 0.21 = 21 $.

Step2: Find the sale price

The sale price is the original price minus the discount amount. So, $ 100 - 21 = 79 $.

Answer:

The sale price of the concert ticket is $79.00.