9. Royalty on the book is less than printing cost by
a. 15% b. 33 c. 20% d. 25%.

[Hint: Printing cost of the book = 20% of CP, Royalty on book = 15% of CP, Difference = (20% of CP) - (15% of CP) = 5% of CP. Percentage difference = 5% of CP Printing cost =%. 33/% × 100% = 25%]

explai me with the steps pls​