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Antonio sold 40 milkshakes while working at Cool Desserts. 55% of the milkshakes were vanilla. The rest were chocolate. After Antonio sold some more vanilla milkshakes, the percentage of chocolate milkshakes decreased to 25%. How many more vanilla milkshakes did Antonio sell?

 Apr 16, 2021

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 #1
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If  55%  were originally vanilla,  then  45%  were chocolate  = .45  * 40  =  18

 

Call x  the number  of additional  vanilla  milkshakes  sold

 

So

 

18  / (40 + x)  =  .25            cross-multiply

 

18  = .25 ( 40 + x)

 

18/ .25  = 40  + x

 

72  =  40  + x

 

x  = 72  -  40   =    32

 

 

cool cool cool

 Apr 16, 2021

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