Question

A 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

Answer:

The original price is $50

see the explanation

Step-by-step explanation:

we know that

$7.50 represent a percentage of 15%

so

using proportion

Find out how much represent a percentage of 100% (original price)

Let

x -----> the original price    

$\frac{\ 7.50}{15\%}=\frac{x}{100\%}\\\\x=100(7.50)/15\\\\x=\ 50$

therefore

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

Answer 2

Answer:The student should have divided the discounted amount by the percent. The percent should’ve been written as a decimal.

Step-by-step explanation:

It says that in the sample response