Question

Different camera is selling for $7.50 off the regular price. It was marked down 15%. A student used the equation:

15(7.5) = Original price
and found the regular price of the camera to be $112.50.
Explain the error(s) in the student’s work.

Answer 1

Sample Response: The student should have divided the discounted amount by the percent. The percent should have been written as a decimal.

Explanation:

Include in your response:

The tax rate should be written as the decimal 0.15 in the equation.

The original price and the 7.5 are reversed in the equation.

The equation should be (Original Price)(0.15) = 7.5.

Divide the 7.5 by 0.15

edge 2023 proof ↓

Answer 2

Answer: the actual price is $8.625

Step-by-step explanation: the student multiplied 15x7.5 which gave him 112.50 when he should have done 15/100 = 0.15 x 7.50 = 1.125 +7.50= 8.625