← All MathIsland labs−%Discounts Lab Browse all labs →
30% + 20% off is not 50% off
Why does this exist?
Discounts stack by multiplication, not addition. See the true size of a double discount.
🔬 The interactive lab is live — currently in Korean
Sliders and simulations speak every language. Most visitors can follow the experiment even without reading Korean — and a full English version of this lab is on the way.
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