Split Cost assignment on a Purchase Order

Hi,

Please can somebody help with the following.

We are using split cost assignment to split cost between two cost centers on a percentage basis. However in transaction ME21N it will only allow 1 decimal place for the percentage and we require two.

It seems strange that SAP would operate to only 1 decimal place here as it uses two in other modules when using percentage's.

Can any advise how we can go about changing this to allow two decimal places? it would probably require amending the qty field as well as this is limited to 3 and a percentage of 31.24 would then exceed this fields capacity as would be 0.3124.

Thanks in advance