Get Percentage of Gas Price Solidity, Ethereum

Question

How can I multiply a uint by a decimal fraction integer? This is what I have so far - I am explicitly converting the decimal fraction integer to type uint. Will this have unintended consequences?

uint gasPriceInWei = tx.gasprice * 1000000000;
uint percentOfGasPrice = uint(transactionCostInWei) * uint(.1);

Answer 1

The proper way to do this in solidity would be to divide by 10:

uint percentOfGasPrice = uint(transactionCostInWei)/10;