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

Explanation:

It says that in the sample response

Answer 2

The original price is $50

see the explanation

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

`(\$7.50)/(15\%)=(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