Price converter AggregatorV3Interface

[obc92]

Hello!
I'm trying to get the price of eth from chainlink using the AggregatorV3Interface. This code is a little different from the FundMe as I want to get the price in Eth with an amount of $ given.
The code compiles and everything works but I'm not getting back the amount of the 1000$ converted to Eth. Something is wrong calling the function.

Solidity code:

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.8;

import "@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol";
import "./PriceConverter.sol";

error Sub_NotQuantity();
error Already_SUB();

contract Code {
    using PriceConverter for uint256;

    //Variables

    enum access {
            DENIED,
            GRANTED
        }

    struct Dades {
        uint256 timer;
        access s_access;
    }

    address payable [] private s_Wallets;
    mapping (address => Dades) s_Registre;
    address public immutable i_owner;
    uint256 private s_SubPrice; //= 0.1 ether;
    uint256 private EthPrice;
    AggregatorV3Interface public priceFeed;
    //access private s_access;

    constructor (uint256 startPrice) {
        i_owner = msg.sender;
        s_SubPrice = startPrice;
        priceFeed = AggregatorV3Interface(0x8A753747A1Fa494EC906cE90E9f37563A8AF630e);
    }

    modifier onlyOwner{
        require(msg.sender == i_owner);  
        _;     
    }
    //Functions

    function PriceConversion() public { //Function where I call the conversion
       
        EthPrice = PriceConverter.ConversionToEth(s_SubPrice, priceFeed);
    }

Library:

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.8;

import "@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol";

library PriceConverter {
    /**
     * Network: Rinkeby
     * Aggregator: ETH/USD
     * Address: 0x8A753747A1Fa494EC906cE90E9f37563A8AF630e
     */
    function getLatestPrice(AggregatorV3Interface priceFeed) internal view returns (uint256) {
        (
            /*uint80 roundID*/,
            int256 price,
            /*uint startedAt*/,
            /*uint timeStamp*/,
            /*uint80 answeredInRound*/
        ) = priceFeed.latestRoundData();
        return uint256(price/100000000);// Retorna 8 decimals 
    }

    function ConversionToEth(uint256 DollaAmount, AggregatorV3Interface priceFeed) internal view returns(uint256) {
        uint256 Price = getLatestPrice(priceFeed);
        uint256 EthAmount = DollaAmount/Price;
        return EthAmount;
    }
}

I can deploy and call the conversion in the rinkeby network, but as you can see the Ethvalue is still 0.
I really don't know what I'm doing wrong.
Does anyone had a similar issue?

[0xKMG]

1. In your given code there's no variable called ethValue, please update the code here so we can help!
2. In any case you shouldn't try reducing the decimal point uint256(price/100000000) before, try follow the method introduced in the tutorial (giving them 18 decimal).
3. Let's say all other things are fine in your code, since the calculation is uint256 EthAmount = DollaAmount/Price, whenever the input Dollar is less than the current eth price (e.g. $110, eth price $1100) , the return will be zero since 0.1 is not an int256.
4. And for other cases the number will be extremely inaccurate: (e.g. $2100, eth price $1100, the return will be 1 but the correct amount is 1.90909.)
5. conclusion: keep the floating points (you can always modify the display of data in frontend).

[obc92]

I understand now how I am losing the decimals and why it was showing 0 all the time. Thanks!!