(e) $18 \%$ of what is 9 ?
So, the final answer is \(\boxed{50}\).
Step 1 :We need to find a number such that 18% of it is equal to 9. This can be represented by the equation \(0.18 * x = 9\), where x is the number we are trying to find.
Step 2 :We can solve for x by dividing both sides of the equation by 0.18.
Step 3 :So, the final answer is \(\boxed{50}\).