Question

A​ store's selling price for a TV includes a​ 135% mark up over what the store paid for the TV. The store decides to discount their selling price by​ 40%. You have a coupon for​ 15% off the discount price. Find the percentage change in the​ store's cost for the TV.

Answer 1

First, find the discount and the discounted price of the TV, reflecting that 40% discount.
One you have a result for that, find the discount and the new discounted price after using the coupon for that 15% discount. Show your work, please.

Answer 2

@mathmale what would be the discount of the tv?

Answer 3

I'd be glad to discuss this with you, but want to see some of your own work first.

Answer 4

Okay, no problem. i'm trying it out now:

Answer 5

@mathmale

Answer 6

Odd question. The store's cost does not change. Are you 100% sure you have copied this problem down correctly?

The store buys the TV for a certain price which does not change.

Answer 7

Yes I copied and pasted on here

Answer 8

@mathmale it says the price of the tv is the orginial price + the 135% mark up?

Answer 9

A.
​0.6885%

B.
​0.1985%

C.
​19.85%

D.
​68.85%
- here are the options

Answer 10

If that's the problem: let the original COST (not price) be x. Then the selling price set by the store is that x, plus 135% of x, or (1.00+1.35)x, or 2.35x. but you still don't have enuf info to figure out the cost to the store of the TV.

Answer 11

Let's see:

Let the store's cost (not selling price) be x.
The initial selling price is 2.35x, as discussed above.
The store decides to discount this selling price by 40%.

What would the new price be?

Answer 12

Hint: it is NOT 2.35x times 0.40. Why?

Answer 13

2.35x-0.4

Answer 14

Can't mix terms that have x in them with terms that do not have x in them.

Answer 15

When you take a percentage of some amount, you MULTIPLY, not subtract.

Answer 16

"Discount" is the amount taken off a price. "Discount" does not represent the new selling price.

Answer 17

so it's 0.94?

Answer 18

@mathmale

Answer 19

Please, show the work you did to come to that conclusion.

Answer 20

2.35 * 0.40

Answer 21

I"m confused because at first you said don't multiply

Answer 22

and then you said multiple to find the answer

Answer 23

Again: The initial selling price is 2.35x. The store discounts this by 40%. Figure out the new selling price.

I told you this 10 minutes ago: "Hint: it is NOT 2.35x times 0.40. Why?"

Answer 24

What does "discount" mean? Does "discount" mean the same thing as "discounted price?"

Answer 25

@mathmale I"m sorry, I'm really trying to understand this but I don't.

Answer 26

i thought when you discount something you subtract it.

Answer 27

Yes, you calculate the discount FIRST and then you subtract that amount of $ from the price. A more efficient way to do this is to MULTIPLY the original selling price by (1-discount fraction). Thus, Multiply 2.35x by (1.00-0.40).

Answer 28

percentage discount is not the same as "dollar amount of the discount."

Answer 29

okay and I got 1.41x

Answer 30

@mathmale

Answer 31

I also got 1.41x. Now, there's yet another discount, this time 15%.

Multiply 1.41x by (1.00-0.15).