Respuesta :

Answer:

4.65 dollars

Step-by-step explanation:

x% of y = [tex]\frac{x}{100}[/tex]×y

            = [tex]\frac{15}{100}[/tex]×31

            = 0.15 × 31

            = 4.65 dollars

∴ William will have to give 4.65 dollars.

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