Question

A certain species of fish costs $3.49 each. You can spend at most $45: How many of this type of fish can you buy for your aquarium?​

Answer 1

3.29f ≤ 45
3.29f/3.29 ≤ 45/3.29
f ≤ 13.68

Since we can't buy 0.68 of a fish and our number must be less than 13.68, we can buy 13 fish.