In certain situations, the minimum monthly amount for payment won't be decreased. For instance, if there is just a partial credit applied to an amount from a purchase transaction, that is not a reduction in the amount of your minimum monthly payment. The reason is that the monthly amount for the purchase amount is fixed. It will be included in the calculation of your monthly minimum payment until the balance of your purchase transaction is zero. For more details on how your minimum monthly amount is determined, review your account agreement.