Trying to put a '%' in a registry value

[Adam Shaw]

I am trying to put a string into a registry value with the 'Create/Update Key and Value' command and running into problems.
I have a string ("C:\Program Files (x86)\Some.exe" Parm1 "%1") that keeps throwing a syntax error.
GEN1077 Syntax Error (1)
Is there any way to escape this percent sign, or another method to achieve my goal?
Thank you!

I had a colleague tell me, it's 2 percent signs: %%