Respuesta :

sqdancefan

Answer:

  • original cost: $195.00
  • % discount: 16%

Step-by-step explanation:

I wouldn't mess with trying to set up proportions. That seems an inappropriate tool for this. Instead, make use of the known relationships between the various prices:

  original cost - discount amount = discounted price

Adding the discounted amount to both sides of this equation gives ...

  original cost = discounted price + discount amount

  original cost = $163.80 + 31.20

  original cost = $195.00

_____

The percentage discount is ...

  percent discount = (discount amount)/(original cost) × 100%

  = $31.20/$195.00 × 100%

  = 16%

The percentage discount is 16%.

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