From a YouGov poll on 8th June:

From the First Minister in a recent briefing:

Since the 22nd June, Test & Protect teams have contact traced more than 900 positive cases. Of the people identified as requiring contact tracing, only 3 individuals out of 925 couldn’t be contacted. In other words, teams have traced 99.7% of those positive cases which is a quite remarkable achievement and based on that work, the teams have also traced more than 5 000 contacts and they have been successful in contacting 98.8% of those individuals.

https://talkingupscotlandtwo.com/2020/08/19/latest-scotlands-test-and-protect-teams-contact-trace-99-7/

And in a stunning performance only just lower than the 99.7% of contacts made in community outbreaks in Scotland, Public Health Scotland‘s teams have contacted 98.14% of all tourists who should have isolated after visiting high risk countries.

https://talkingupscotlandtwo.com/2020/08/21/scottish-tracers-contact-more-than-98-of-tourists-who-should-quarantine/