How to escape percent character (%) in nginx rewrite rule?

Question

Nginx

Hello!
Tell me how to escape the percent character (%) in the rewrite rule for nginx?
Simplified example: The example does not work, but if you remove the percentage, then /E3 redirects (ie, the error is in the % symbol). The variant with such escaping - ^/\%E3$ - doesn't work either. UPD: Working version:
rewrite ^/%E3$ https://site.ru/url.html permanent;

rewrite ^/\xE3$ https://site.ru/url.html permanent;

Answer 1

Try rewrite ^/\x25E3$ ...orrewrite (*UTF8)^/\x25E3$ ...

Answer 2

Try%%