The sale of a cinema tickets is increased by 25% and price of ticket increased by 10%. Find the percentage change in the revenue.

37.5 %

25% = \(\frac{1}{4}\)      ,        10% = \(\frac{1}{10}\)

                             Old      :      New

 Sale of tickets         4       :         5

 Price of tickets       10      :        11

                              ------------------

Revenue                 40      :         55        →     15 (Difference)

(sale × Price)

Revenue increased percentage = \(\frac{15}{40}\) × 100 = 37.5%