A warehouse club allows non members to shop, but charges them a 10% mark up on all items purchased. If a computer costs $549.99 for members, what is the non member price?

- anonymous

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- schrodinger

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- anonymous

Ok, I'd start by changing 549.99 to 550$ A tad easier that way

- anonymous

ok

- anonymous

Ok, so the problem states that 550$ is the normal price, for members. If nonmembers are charged 10% more, that means they pay 110% total. Do you understand why?

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## More answers

- anonymous

no

- anonymous

Alright, let me try a different tactic then...

- anonymous

First, multiply the member price, 550$ by 10%

- anonymous

5500

- anonymous

Did you hit percent?

- anonymous

10% is not the same as 10

- anonymous

Oh.

- anonymous

550

- anonymous

Drop one more zero. 55

- anonymous

How would I get that on a calculator?

- anonymous

Do you have a percent button? If not, you can also use .10 for 10%

- anonymous

that's 0.10 Not ten

- anonymous

No. I will try using the decimal. I got 55

- anonymous

Ok, excellent! 55 is 10% of 550. So, if you add 55 to the original price of 550, you get the 10% markup, your final answer. Try that, I'll be back in a minute

- anonymous

Ok!

- anonymous

$605

- anonymous

You got it :)

- anonymous

Pure awesomeness! The next question was should a member join the club prior to purchasing the computer if the fee is $40. I said yes.

- anonymous

That's right as well

- anonymous

:)

- anonymous

Do you understand why .10 is equal to 10%?

- anonymous

To cover his expenses, Denny marks the price of each item 30% more than his purchase price. What does Denny charge for items that cost him $1.04, $7.23, $9.99 and $42.77?

- anonymous

Ok, before I give you a hint, try to get the first. 1.04$

- anonymous

What do you mean?

- anonymous

Each item is marked up 30%, so there are four answers here

- anonymous

Remember on the last problem, you multiplied the original price by .1, for 30%, what would you use?

- anonymous

Division?

- anonymous

$3.33 is that the answer?

- anonymous

Hmm, let me see if I can teach you a short way to do this. So you remember in the last problem, you used .10 for 10%?

- anonymous

Yeah.

- anonymous

You need to use 30% in this, so what decimal would you use?

- anonymous

.30

- anonymous

Good. Now he's a little trick. 50% is .50, 85% is .85, and 100% is actually 1

- anonymous

Ok!

- anonymous

If you add your markup decimal (.30) to 1, you get 1.3 Right?

- anonymous

Where did the one come from?

- anonymous

Because the original price is 100% of itself, it's a bit complicated. Point is, if you take that 1.3 and multiply it by each of those prices, you get the correct answer

- anonymous

$1.04, $7.23, $9.99 and $42.77 Multiply each by 1.3 on your calculator

- anonymous

oh ok!

- anonymous

1.34
9.40
12.99
55.60

- anonymous

Perfect!

- anonymous

Now let me go back and show you something

- anonymous

- anonymous

You have a 10% Markup here, so take that .10, and add it to 1, like we did just now

- anonymous

1.1

- anonymous

Right, now multiply that by 550. Seem familiar? :)

- anonymous

When Denny has a sale he marks the price 15% more than his purchase price. What is the price of each the above items?

- anonymous

605

- anonymous

Yep, that trick works for every price mark up problem!

- anonymous

Wait! Please help me with the first one.

- anonymous

Sure, what do you need? Although I need to go kinda soon

- anonymous

Ok I just need help with like the first two of this problem.When Denny has a sale he marks the price 15% more than his purchase price. What is the price of each the above items?

- anonymous

Same prices as before? $1.04, $7.23, $9.99 and $42.77?

- anonymous

Yes.

- anonymous

Ok, same trick as before
15% = .15
.15+1=1.15
1.15 x 1.04$ = 1.19 $
1.15 x 7.23$ = 8.31$
1.15 x 9.99$ = 11.49$
1.15 x 42.77$ = 49.19$

- anonymous

You have helped me so much! Thank you so much!

- anonymous

You are very welcome. Good luck with your studies!

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