40% of the pieces of fruit in the Bowl are apples.    
Step-by-step explanation:
Given the statement:- There are 15 pieces of fruit in a bowl and six of them are apples.
⇒ Total number of pieces of fruit  in a bowl = 15 pieces
and  
Number of pieces of apple in a bowl = 6 pieces.
To find the percentage of the pieces of fruit in the Bowl are apples.
                           = 
Therefore, 40% of the pieces of fruit in the Bowl are apples.