Help with fractions of a race

[CheckMark]

1/5th
2/5th
3/5th
4/5th

You would hear it all the time but I am just clarifying if:

1/5 would equal .2 so .1 would be .2?
2/5 would equal .4 so .2 would be .4?
3/5 would equal .6 so .3 would be .6?
4/5 would equal .8 so .4 would be .8?

I am trying to create speed figure pars for a few racetracks and just wanted to know if I am doing something right or wrong with the above?

I have also attached a screen shot of what I am bolding in text

Thanks all