Suppose the fare is X, and the number of spectators has doubled because of the price reduction. Then suppose that the original number of spectators is 1 and the number of people increased is 2, then

The original income was 20× 1, and now the income is x×2.

Income increased by 1/5, then

Solution: If the fare is X, then according to the meaning of the question, there are

(20× 1)×( 1+ 1/5)= x×2

That is, 20×6/5=x×2.

That is, 24=2x.

So x= 12.

A: The current fare is 12 yuan.