i need help on letter b!

40 of the toys weren't dolls. The reason why is 5/8 times 64 is equal to 40.
Well given that there are 64 prizes (8/8)you have to divide by 8 to see how many there would be in 1/8:
64/8 = 8
So, if you do 8/8-5/8 = 3/8
Therefore, if you multiply 8*3 you will be given 24 which is the total amount of prizes that are not dolls