Fractional Token Swap

Smart Contracts
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1

Hi all, I am trying to create a token swap where someone can buy my erc20 token for a specific rate that is not a whole number. The part of my code I am having trouble with is the transfer part and is as follows (note that "rate" is equal to 105):

uint256 amount = ((_amount) * (100 / rate));
timeToken.transfer(msg.sender, amount);

I have a front end too and when I try swapping the tokens, nothing is received is the callers account; note that if I do the following, the caller receives _amount*105 of the tokens they used:

uint256 amount = ((_amount) * (rate));
timeToken.transfer(msg.sender, amount);

Any and all help is appreciated!

2

100 / 105 = 0 and not 0.95238095238 because Solidity can't handle decimals.

3

Hey, I understand that, but is there anyway to work around this?

4

well, use a higher number like 100e18

uint256 amount = ((_amount) * (100e18 / rate)) / 1e18;