strange string format percent c# output

Question

does anybody have an idea why following code outputs 1000% for RebatePercent=10 :

return RebatePercent > 0 ? $"{RebatePercent.ToString("0%")}" : "-";

I didn't find anything to output 10%

thx

Answer 1

If you want to keep the use of string interpolation then you can just:

return RebatePercent > 0 ? $"{RebatePercent.ToString()}%" : "-";

Answer 2

you can use as:

RebatePercent > 0 ? String.Format("{0}%", RebatePercent) : "-";

and in C#6:

RebatePercent > 0 ? $"{RebatePercent}%" : "-";