royalty example solidity

pragma solidity ^0.8.0;
contract royaltyExample {
	uint8 royalty = 50; //this is 50%
	address payable owner;

	constructor() {
		owner = payable(msg.sender);
	}

	function sendMoneySomewhere(address payable _to) public payable {
		uint256 amount = (msg.value * royalty) / 100;
		_to.transfer(amount);
	}

	function withdrawAll() public {
		require(msg.sender == owner);
		payable(msg.sender).transfer(address(this).balance);
	}

	function withdrawAmount(uint256 _amount) public {
		require(msg.sender == owner);
		payable(msg.sender).transfer(_amount);
	}
}