c# - Operator '*' cannot be applied to operands of type 'double' and 'decimal'

Question

I get this message in my program but i don't know how to fix it i have search on the net but don't find any thing that can help me.

private double Price;
private int Count;
private double Vat;

private const double foodVATRate = 0.12, otherVATRate = 0.25;
private decimal Finalprice;
private decimal Rate;

public void Readinput()
{
    Finalprice = (decimal)(Price * Count);
}

private void cal()
{
    char answer = char.Parse(Console.ReadLine());
    if ((answer == 'y') || (answer == 'Y'))
        Vat = foodVATRate;
    else
        Vat = otherVATRate;

    Rate = Vat * Finalprice;

Operator '*' cannot be applied to operands of type 'double' and 'decimal' is what comes up on Rate = Vat * Finalprice; and i don't know i can fix it

Answer 1

You need to cast one to the other. My guess is that both Price and all of your VAT rates should really be decimal - double isn't (usually) appropriate for dealing with any type of monetary values.