One discount off a price is a single multiplication. The two things worth a tool are stacking and reversing.
Stacked discounts do not add up: each cut applies to the price the one before it left, so 50% then an extra 20% is 60% off rather than 70%. And if all you have is the tag and the till price, the calculator runs the other way and tells you what actually came off.
No, and this is the one worth knowing. The second cut applies to the already reduced price, so 50% then 20% is 60% off, not 70%. On ₱1,000 you pay ₱400, not ₱300. Adding the percentages always overstates the saving, and the gap widens with each extra cut.
Not to the total. Multiplication commutes, so 30% then 15% lands on the same price as 15% then 30%. It can matter to a shop’s own rules about which promotions combine, but not to the arithmetic.
Switch to "Work out the discount" and enter both. That is the question you ask standing in the shop, and it is division rather than multiplication: what came off, over what it started at.
No, deliberately. Those are statutory under RA 9994 and RA 10754, and they are not a plain percentage off the shelf price — they interact with VAT exemption, so the computation is different from what this tool does. Taking 20% off the tag would give you the wrong figure, so the tool does not offer it.
Whatever is in the price you type. This works on the number you give it and does not add or remove tax. Use the VAT Calculator to separate a VAT-inclusive price into its parts.
₱100 apart on a ₱1,000 item. Stacking three 30% cuts is 65.7% off, not 90% — and no number of discounts under 100% ever reaches free.
Senior citizen and PWD discounts are statutory and are not modelled here — they interact with VAT exemption rather than being a plain percentage off. Nothing you type here is sent to our servers — the calculation runs entirely in your browser.
