When you buy or sell cryptocurrency, fees are charged separately from the amount in your trade order.
For example, if you place an order to buy $100 USD worth of BTC and the fee is 0.25%, the transaction will show as a BTC purchase of $100 and a separate fee of $0.25.
You can choose to have fees paid using ZOOM tokens, which may provide a discount, or from your account balance.
For the most up-to-date rates, see the current fee schedule here.