After a 85 % ​reduction, you purchase a new soft drink machine on sale for ​$78. What was its original price?

Answer 1

Let the original price be $x

After 85% price reduction, it would be now valued at x - 0.85x = 0.15x

So 0.15x = 78, or x = 78/0.15 = $520.

So the original price is $520.