Answer:
6 clown fish and 4 angel fish
Step-by-step explanation:
lets say he bought 8 clown fish.
12*8 = 96
the last 4 dollars wont be used.
lets say he bought 7 clown fish-
12*7 = 84
100 - 84 = 16. 16 is not a multiple of 7.
lets say he bought 6 clown fish,
12*6 = 72
100 - 72 = 28
28/7 = 4
If David has $100 dollars to spend and wants to spend every dollar, he can buy 6 clown fish and 4 angel fish.
