Answer:
0.02 would be the smallest
Explanation:
If you convert all of them into fractions then 0.02 would be 1/50, and 2.4% would be 2 2/5 and 1/4 would be 1/40 or you could convert them all into percentages and get 2%, 2.4% and, 25% and the smallest percent would be 2% which is 0.02