Answer:
25 performances
Explanation:
If 80% of their total performances is 20 shows then 40% of their total performance is 10. Then divide it in half again and you will get 20% and 5 shows. You only need to know 20% to find the total amount. 20% + 80% = 100%. 5 + 20 = 25
I am sorry if this doesn't make a lot of sense, I didn't know how to word it!!