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Mathematics 8 Online
OpenStudy (anonymous):

Cheese sticks that were previously priced at "5 for $1" are now "4 for $1" Find the percent decrease in the number of cheese sticks you can buy for $1? HELP!

OpenStudy (anonymous):

Well how much less can you buy now than you could buy before?

OpenStudy (anonymous):

What do you mean?

OpenStudy (anonymous):

SOMEONE help me!

OpenStudy (anonymous):

Before you could buy 5 right? And now you can only buy 4? so how many less is that? ( I know it's obvious but it's important to the problem)

OpenStudy (anonymous):

oh, it's 1!

OpenStudy (anonymous):

^^

OpenStudy (anonymous):

Yeah So you could buy 5 before right? So if you can buy 1 less, out of 5 TOTAL what is your percentage?

OpenStudy (anonymous):

20%!?!?!

OpenStudy (anonymous):

I'm not sure?

OpenStudy (anonymous):

Yep

OpenStudy (anonymous):

Good job :)

OpenStudy (anonymous):

oh, THANK YOU!

OpenStudy (anonymous):

And what's the percent increase in the price per cheese stick?

OpenStudy (anonymous):

Someone help!

OpenStudy (anonymous):

Oh sorry didn't see this Well calculate the base rates of the cheesesticks How much did 1 cheesestick cost before and how much does 1 cost now?

OpenStudy (anonymous):

I think 0.20 cents?

OpenStudy (phi):

yes

OpenStudy (phi):

now find the new price

OpenStudy (anonymous):

And the 4 for $1 is 0.25

OpenStudy (phi):

next find the increase in price (change in price)

OpenStudy (anonymous):

0.05 but i need to put it in percentage

OpenStudy (phi):

yes, now we use the idea that percent increase (or decrease) is the fraction amount of change/original amount in other words, 5/20 change that to a decimal

OpenStudy (anonymous):

0.4 =40%

OpenStudy (phi):

5/20 is not .4

OpenStudy (phi):

you could simplify 5/20 by dividing top and bottom by 5 to get ¼

OpenStudy (anonymous):

oh, 25%

OpenStudy (phi):

now divide 4 into 1.0 (or use a calculator.. though it would be good to be able to do it by hand) yes you get 0.25 then the last step is change the decimal to a fraction by 1) multiply by 100 2) append a % sign you get 25%

OpenStudy (phi):

The price increased by 25%

OpenStudy (anonymous):

ok, thank you soooo much! |dw:1454025443409:dw|

OpenStudy (phi):

what an artist!

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