I have created a calculation of profit function using If statement, But I guess it's not working perfectly. Anything wrong? [duplicate]

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The is the function I have created:

function profit_calculation() {                                                 
        var product_profit = document.getElementById("profit").value;
        var int_product_profit = parseInt(product_profit);
        var product_cost = document.getElementById("cost").value;
        var int_product_cost = parseInt(product_cost);
        var profit_added_price = int_product_cost + int_product_profit;
        var profit_added_price_per = int_product_profit/int_product_cost*100;
        var profit_check = product_profit.includes("%");        
    
        if (profit_check = true){               
                document.getElementById("price").value= profit_added_price_per;         
        }else{          
                document.getElementById("price").value= profit_added_price;             
        }
    }

I was working on this but it only runs the function with in the if statement the function under else is totally not working. Please see if anything wrong I have done here. Thanks