{"slug":"discount","name":"Discount Calculator","category":"fortune","tags":["spending","saving","everyday"],"tagline":"Sale price after one or two stacked discounts — and why 20% + 10% is not 30% off.","endpoint":"https://xearno.tools/api/v1/tools/discount","page":"https://xearno.tools/t/discount","description":"Final price and amount saved after a discount, with optional second stacked discount (coupon on top of sale). Shows the true combined percentage, which is always less than the sum.","inputSchema":{"type":"object","properties":{"price":{"description":"Original price","type":"number","minimum":0,"default":89.99},"discount1":{"description":"Discount (%)","type":"number","minimum":0,"maximum":100,"default":20},"discount2":{"description":"Extra discount (stacked) (%) A coupon applied after the first discount.","type":"number","minimum":0,"maximum":100,"default":0}},"required":[],"additionalProperties":false},"methodology":["Final price = price × (1 − d₁) × (1 − d₂). Stacked discounts multiply, so the combined rate is 1 − (1−d₁)(1−d₂), always below d₁ + d₂."],"usage":"POST https://xearno.tools/api/v1/tools/discount with a JSON body matching inputSchema."}