REPORT Z_ROUNDING .

DATA: float TYPE f,
      amount TYPE p DECIMALS 2,
      correctamount TYPE p DECIMALS 2,
      chars(5) TYPE c value '1.005'.

CLASS cl_abap_math DEFINITION LOAD.

correctamount = chars.
WRITE: / 'Exactly:', chars,
       / 'Correct Amount:',  correctamount.

float = chars.
amount = float.

skip 2.
WRITE: / '==== Usual Processing:',
       / 'Float:', float,
       / 'Decimals 3:', float DECIMALS 3,
       / 'Decimals 2:', float DECIMALS 2,
       / 'Amount:',  amount.

float = cl_abap_math=>round_f_to_15_decs( float ).
amount = float.

skip 2.
WRITE: / '==== Correct Processing:',
       / 'Float:', float,
       / 'Decimals 3:', float DECIMALS 3,
       / 'Decimals 2:', float DECIMALS 2,
       / 'Amount:',  amount.