perc is one coin on Robinhood Chain, launched on pons and paired with a single pair asset. Every trade pays a tax, in the pair asset, into the pot. On a fifteen minute clock the pot pours back out along a route fixed at deployment: to holders, to grounds, to the jackpot, to the deployer's stream. This site is a window onto that one contract. Every number on it is read from the chain.
Three things make perc different from a coin on an ordinary curve. Holders are paid by how long they have held, not just how much. The coin has a floor that can only go up, backed by reserves you can redeem against at any time. And the payout clock is driven by the traders themselves, so it runs with no server and no bot.
The rest of this manual walks through each rule with the exact formula the contract uses.