Just made a test buying 1 ETH at $229.12 and selling at $228.94 with $0.18 loss.
Account was deducted by $1.10
So fees are $1.10-$0.18= $0.92
Percentage of fees works out as - $0.92/$229=0.4%
You made 2 trades. One to buy and one to sell. Thus the fees are 0.4% for both, or 0.2% each.