6060 to 2908.8 is an increase? are you sure about that one?

if you want to figure out the percentage change from one thing to another

cross multiply and if you are looking for the ("50% more" or what not just subtract 100% from that)

Results 1 to 10 of 10

- June 26th 2007, 05:55 PM #1
## Please Reada::...

Hey, i've decided to give myself some things to work out., in preparation for my Exam. Obviously it's not any questions from the exam, how would i have got a hold of them? They may seem easy, but some people do happen to be

__Dyslexic:__

I originally posted this in another forum, but they obviously didn’t get what I mean:*I posted that this was NOT homework. I had set myself a question to answer, and i wanted to find out HOW!*

*People immediately presume, that every question that resembles these ones must be homework =[*

**Peter works as a real estate agent and is paid commission at a variable rate. He receives 4% on the first $100 000 of sales, 21/2 % on the next $100 000 of sales and 11/2% on the remaining balance of sales. If peter sell’s a house for $349 000 how much will he be paid?**

**Monica knows that the selling price of a walkman is $89.95. She also knows that this price includes a mark up of 10%. What was the original price of the walk-man?**

(Potentially you would go like this if it was not a mark up) 89.95 x 10% (without having to use the =’s sign)

**And: The Numbers in the left column have been changed to the numbers in the right column. Determine the percentage change and state whether it was an increase or decrease.**

**3452 ----- 4315**6060 ------- 2908.8

I have already established that both have been increased? But I’m not sure about these percentage changes =[

- June 26th 2007, 06:16 PM #2

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- June 26th 2007, 06:27 PM #3

- June 26th 2007, 06:30 PM #4

- June 26th 2007, 06:40 PM #5

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ok ill show you,

now you can multiply across the equals sign, following the principles of algebra

so now we divide by 3452

punch it into our handy dandy calculator (or google it)

so x is 125! that means 4315 is 125% of 3452 or equivalently

4315 is 25% more than 3452

- June 26th 2007, 06:45 PM #6

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well ok and to your other problems, well im not sure i get the first one so soundly, but for the second one what you want to know is what number + 10% = 89.95

what youre really saying is that 110% of x (the original cost is equal to 89.95

well so convert the 110% to decimal and you have the equation

1.1x = 89.95

- June 26th 2007, 07:21 PM #7

- June 26th 2007, 07:42 PM #8

- June 26th 2007, 07:59 PM #9

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- June 26th 2007, 08:26 PM #10

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Hello, Sazza!

Peter works as a real estate agent and is paid commission at a variable rate.

He receives 4% on the first $100,000 of sales, 2½% on the next $100,000 of sales

and 1½% on the remaining balance of sales.

If Peter sells a house for $349,000, how much will he be paid?

He gets 2½% of the next $100,000: .

And he gets 1½% of the rest: .

His total commission is: .

Monica knows that the selling price of a Walkman is $89.95.

She also knows that this price includes a mark up of 10% (of cost).

What was the original cost of the Walkman?**[1]**

. . We also know that: .

Substitute into [1]: .

Then: .

. . So we have: .

Since , we have: .

. . Then: .

Therefore, the original cost was about .

The Numbers in the left column have been changed to the numbers in the right column.

Determine the percentage change and state whether it was an increase or decrease.

. . Percent of increase: .

The second one changed from 6060 to 2908.8. .There was a decrease of 3151.2

. . Percent of decrease: .