Going from Persian (Farsi) to Uzbek (O'zbek) has a composite linguistic distance of 66% (curated lexical data). Below is the dimension-by-dimension breakdown.
Shared vocabulary, cognates, and loanwords.
Morphology, syntax, word order, cases.
Shared sounds and phoneme inventory.
Arabic → Latin/Cyrillic
Indo-European ↔ Turkic
The 5 languages with the lowest linguistic distance from Persian (Farsi):
A quick 3-question check between Persian (Farsi) and Uzbek. No signup.