Respuesta :

Answer:

20

Step-by-step explanation:

100-80=20

20/100*100=20

The percentage of decreasing = 20%

Step-by-step explanation:

Actual price of the book = $100

After decreasing the price, the price = $80

Decreasing value = $100 - $80 = $20

Percentage = [tex]\frac{20}{100}[/tex] X 100

= 20%

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