Um, perhaps you mean expressed as fractions?
Checking on Google the conversion rates are more like:
1 Polish zloty = 1/6 of a GBP, 1/3 of a USD and 1/4 of Euro
Or, 1 Polish zloty = 0.17 GBP = 0.32 USD = 0.25 Euro
Good tip with Google is, if you know the abbreviation for the currency...