double to decimal place

Question

I want to show the decimal place..

 

double mper = m / 100;

double mperdec = m % 100;

lbllocalper.Text = mper + "." + mperdec + "%";

 

if m is 2, mper will be 0.0 and mperdec will be 2.

But if I show in lbllocalper ,

it becomes 0.2!

I actually want 0.02! 

 

If there is any solutions for me, please cmt in  my post.

Thanks a lot for viewing my post.