PYG/MXN is the currency pair comparing the price of PYG/MXN to that of PYG/MXN and current figures tell us that we need 0.00249 MXN if we're interested in buying a PYG.
Going into terminology, in this case PYG is the transaction currency or base currency therefore the counter or quote currency is MXN.
In the last hours we have been able to observe how the price of this pair has varied and as a result we obtain a minimum price of 0.00249 and a maximum price of 0.00250 y means a percentage of variation of the 0.40000% due to the difference of 0.00001.