Converting Celsius to Farenheit

Question

Hello I have created a simple program that converts celsius to farenheit but, for some reason the math operation i used is not giving me the correct result. celsius to farenheit is

F = 9/5 * C + 32. I broke down the problem and the error lies with the fraction (9/5). For some reason this calculation gives me a result of 1. Obviously im missing something here. Any help would be appreciated and thank you. here is my code...

 

private void btnF_Click(object sender, EventArgs e)

{

double cel, total;

 

cel = Double.Parse(txtC.Text);

 

total = 9/5 * cel + 32;

 

lblResult.Text = total.ToString();

}

 

would i have to cast the variable to float? and if i do cant that cause loss of data?

do I have to use a Math method? what am i doing wrong?