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Darius sold 50 milkshakes while working at Cool Treats. 40% of the milkshakes were vanilla. The rest were chocolate. After Darius sold some more vanilla milkshakes, the percentage of chocolate milkshakes decreased to 5%. How many more vanilla milkshakes did Darius sell?

 Apr 13, 2021
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Darius sold 50 milkshakes while working at Cool Treats. 40% of the milkshakes were vanilla. The rest were chocolate. After Darius sold some more vanilla milkshakes, the percentage of chocolate milkshakes decreased to 5%. How many more vanilla milkshakes did Darius sell?

 

decreased to and decreased by have a different meaning

 

...the percentage of chocolate milkshakes decreased to 5% (from 60%)

 

So, Darius sold 95% vanilla milkshakes and 5% chocolate milkshakes.

 

5% / 30 = 95% / x            x = 570

 

Darius sold 550 more vanilla milkshakes.

 May 4, 2021

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