How do you calculate an original price from a discounted price and a percentage rate?
For example: Say I know I get 30% off on a product and the discounted price is $20.65. Simply multiplying $20.65 by 30% (which equals $26.85) doesn’t calculate the correct original price (which is $29.50), because it’s a percentage of the discounted price, not the original price. So what’s the formula for calculating this correctly [...]

