A certain number is 20% of Number A

That number is also 40% of Number B

Which number is bigger: A or B?

A is bigger

Step-by-step explanation:

lets say the certain number is 10 and if its 20% of Number A that would mean that number A is 50 and that would also mean that number B is 25 so since 50 is bigger then 25 that would mean number A is bigger