How is taker fee calculated?

Excuse me, could you please explain in more detail how the taker fee is calculated in the cryptocurrency trading market? I understand that it's the fee charged to the trader who initiates a trade by placing an order that is matched with an existing order on the order book. But I'm curious about the specific formula or methodology used to determine this fee. Does it vary based on the trading platform, the cryptocurrency being traded, or other factors? And how does it compare to the Maker fee, which is charged to traders who place orders that add liquidity to the market? Thank you for your clarification.