% Help with working out percentages

[ghostrider]

I'm really having a thick day  
I'm trying to work out percentages and can't remember the formula for some reason, dunno why just can't. Was only using it last week.

Example: total weight = 232.53
        weight retained = 122.88
  percentage retained = 52.84%

And i just cannot remember how to get there.

Please no snide comments, i know it is simple but as has been stated my brain just isn't working.

[anth]

(122.88 divided by 232.53) x 100 = the percentage.

[nutkin]

your result divided by possible result, x 100

EDIT: Beaten to it - how come everyone types much faster than me?? 

[ghostrider]

Thanks for that new it was real easy but just couldn't think, need to get a new brain.

[anth]

It's worse than that Nutkin. I had time to type that out, then edit the brackets in!