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The problem is this:

 

"A store sells cookies at 8 cookies for $2.00. If it changes the price to 10 cookies for $3.00, what is the percent increase in price per cookie?"

 Dec 20, 2018
 #1
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"A store sells cookies at 8 cookies for $2.00. If it changes the price to 10 cookies for $3.00, what is the percent increase in price per cookie?"

 

2.00 / 8 =  .25 per cookie

 

3.00 /10  = .30 per cookie

 

Price increase is

 

[ 30 - 25 ] / 25  x  100%  =

 

[ 5 ] / 25    x 100% =

 

1/5 x 100% =

 

[100 / 5] %  =

 

20 %

 

cool cool cool

 Dec 20, 2018

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