The sale of a cinema tickets is increased by 35% and price of ticket increased by 15%. Find the percentage change in the revenue.

55.25%

35% = \(\frac{7}{20}\)      ,        15% = \(\frac{3}{20}\)

                             Old      :      New

 Sale of tickets        20      :         27

 Price of tickets       20      :        23

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

Revenue                400      :         621        →     221 (Difference)

(sale × Price)

Revenue increased percentage = \(\frac{221}{400}\) × 100 = 55.25%