Model car fractions

This task is about fractions of numbers.
red-car.png blue-car.png black car.png
 
Jordan, Kelly, Ariana, Kimi and Iona have some model cars.

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a)  Kelly has 24 cars and \(1 \over 4\) of them are blue. 
     How many blue cars does she have?  

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b) \(1 \over 10\) of Jordan's 50 cars are red.
      How many red cars does he have? 

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c) \(3 \over 5\) of Ariana's 25 cars are Toyotas.
     How many Toyotas does she have?  

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d)  Kimi has 8 black cars. \(1 \over 4\) of all her cars are black.
     How many cars does Kimi have altogether? 

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e) \(2 \over 3\) of Iona's cars are Fords. She has 12 Fords.
     How many cars does Iona have altogether?