Question

The price of a fan is $15. The price is 27% lower than last week.

What was the price of the fan last week?

Round your answer to the nearest cent.

Answer 1

The price last week was 100% of that price.
The price this week is 27% lower than the price last week.
What is 100% minus 27%?

Answer 2

100 - 27 = ?

Answer 3

73 @mathstudent55

Answer 4

Good.
100 - 27 = 73, so
100% - 27% = 73%

That means that the $15 you pay this week is 73% of the original price.

Answer 5

The original price is unknown, so we call it x.
The price this week is 73% of the original price, and it is $15.
We can think of this problem as the following problem:

73% of what number is 15 ?

We write an equation based on this question.

73% of x = 15

In math, "of" usually means ""times":

73% * x = 15

Also, % means "divided by 100."

\(\dfrac{73}{100} x = 15\)

or

\(0.73x = 100\)

Can you solve this equation (or the one above with the fraction) for x?

Answer 6

Um x equals 136.986301369863

Answer 7

I think

Answer 8

Does $136 sound reasonable, if the original price were somewhere around $15?

Answer 9

Nah

Answer 10

Let x represent the price of the fan last week, before the sale started.

This week's price is x - 0.27x = $15.

Solve this for x, please.

Answer 11

I guessing the answer is no higher than 50

Answer 12

Guessing has no place here, sorry.

Answer 13

:|

Answer 14

Well okay

Answer 15

$136 is too much.
You have an an equation in which a number times x equals another number.
You want x alone, so just divide both sides by the number multiplying x.

\(0.73x = 15\)

\(\dfrac{0.73}{\color{red}{0.73}} x = \dfrac{15}{\color{red}{0.73}} \)

What is 15/0.73?