Original price * (1-percentage of sale )= discount/current price

original price = (current price)/(1-percentage of sale )

here

original price = x

current price = 63.75

percentage of sale =15%

x = 63.75/(1-.15)

x= 63.75/.85

x= 75

So original price = 75

original price = (current price)/(1-percentage of sale )

here

original price = x

current price = 63.75

percentage of sale =15%

x = 63.75/(1-.15)

x= 63.75/.85

x= 75

So original price = 75