Juan bought a basketball for 40% off if he paid $36 for the basketball. What was the original price?

Let X be the original price.

The basketball is 100% - 40% = 60% of the original price.
So the basketball's price is X * 60% = $36.
Thus, the original price X = $36 / 60% = $<<60=60>>60. Answer: \boxed{60}.