Answer: $900
Step-by-step explanation:
Let the original price of the blu ray player be x.
Given : During a clearance sale an electronic store sold a blu ray player for $225 if items on sale were discounted by 75%.
75% = 0.75 [we divide percent by 100 to convert it into decimal]
According to the question , we have

Hence, the original retail price of the blu ray player = $900.