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Fraction of square tiles  = 
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Fraction of rectangle tiles  = 
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Step-by-step explanation:
Total number of tiles to be used in the kitchen = 100
The total number of square tiles  = 34
The total number of rectangle tiles  =  16
Now, calculating the total fraction of square tiles:
The fraction of square tiles  = 
Also, solving the fraction, we get 
So, the decimal value of square tiles  = 0.6
Calculating the total fraction of rectangle tiles:
The fraction of rectangle tiles  = 
Also, solving the fraction, we get 
So, the decimal value of rectangle tiles  = 0.34