The 14,15 and 17 are fine, I don't understand the 16.
the 18 is 30, the 19 is 43, and 20 is 180
Answer:
22.8
Step-by-step explanation:

60/5 = 12
From the ratio we know that 5:4 is clownfish to angel fish, therefore
12*4 = 48
There are 48 angel fish.
4 angelfish : 3 goldfish
48/4 = 12
12*3 = 36
48:36
There are 36 goldfish. Hope this helps!