your answer would be 9 fish are left in the tank
So you want to know how much was paid in total?
First, how much is 18% of 43?
43*0.18 =8.64
so the total prize will be the sum of the gratuty and the dinner prize: 43+8.64=51.64
and this is the solution!
2/3 x 9 = 6 slices
1/3 x 18 = 6 slices
Hence they give the same number of slices.