Can i get a little help?

I have a audio incorporate on my apps. I know the max volume of Audio is 255 and i do this

nVol = nVolume / 2.55;

Label.SetText("Vol", nVol.."%");


The problem is the result below 100 is 99.12242543645%


how can i make it fixed in number?

Example: 100-99-98-97 >>>>>