A man gets a discount 25% and then 45% on his food bill. How much equivalent single discount does he get?

58.75%

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

45% = \(\frac{9}{20}\)

                 M.P.          S.P.

@25%       4       :       3

@45%       20     :      11        

Final        80       :      33       = -47

Equivalent single discount = \(\frac{47}{80}\) × 100 = \(\frac{214}{5}\) = 58.75%