as ABAP does not store decimals, the amount values are interpreted according to the decimals in the currency.
I have a field referring to standard data type TB_BZBETR which is currency field with CURR and 2 decimal places,
The default is 2 decimals, but some currencies like JPY, MEX are usually defined without decimals. So make sure your amount field is linked to a currency field via the ALV field catalog and maintain this field with the appropriate currency.
regards,
JNN