Multiply the original price by the discount percentage divided by 100 to get the saved amount, then subtract it from the original price.
Saved amount = List price × (Discount % ÷ 100). Sale price = List price − Saved amount. The calculator shows both instantly, plus what GST would be on the discounted value.
GST applies on the final taxable value, i.e. the price after the discount. You must always compute GST on the post-discount amount shown on the GST invoice.
Markup-back tells you how much you must raise the discounted price to return to the original list price. It is useful for sale planning so you know the true relationship between a discount and the price restoration.
Any discount more than your margin means you are selling at a loss. Calculate your break-even using the selling price calculator, then keep every promotional discount below that margin.
Compare the discounted price against your total cost including GST. If you are not sure of your cost structure, email rautprajwal36@gmail.com and we will help you check it.