Is there a sign for 'per decem'?

Question

There are signs for per cent (%), per mille (‰), per myriad (‱) et cetera, but is there a sign representing one part per ten, or 'per decem'?

If so, how does it look like? If not, why not?

Answer 1

Since 'ppt' is already used for 'parts per trillion', I'd settle for the sign ⁰⁄  that was proposed.