If the circus were to sell all of its 220 tickets for this

Answer is 5%. The wordings were really tricky.

let p be the usual price, if 220 tickets are to be sold for this month.
Hence, revenue = 220p.

Now, let x be the number of tickets sold previous month. Since P is the usual price.
Last month's revenue = xp.

if 220 tickets were to be sold this month's revenue would have been 10% greater than previous month's. Hence,

220p = xp + (xp/10) => 220p = 1.1xp => x = 200. That mean last month's revenue was 200p ---- 1

Now, actual changes for this month :

P is increased by 5% so, this month's price = 1.05p.
Hence this month's revenue would be 210p. ------ 2

Finally(using 1 and 2):

210p-200p/200p * 100 = 5%.

. Well!! I got a Q30 in my first attempt, recently. Yeah!! that's embarrassing.
However, I am trying my best to boost my Q.

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