During a clearance sale, an electronic store solded a blu-ray player for $615. if items on sale were discounted by 25%, find the original retail price of the blu-ray player.

Since 100% - 25% = 75%, you would do 75/100, which simplifies as 3/4. Then, the reciprocal of 3/4 = 4/3. You would do 4/3 * 615, which would equal 4/3 * 600 + 4/3 * 15, which would equal 800 + 20, equivalent to the 820. I hope this helped!!!