some calculate problem xkwert = 100000 * komp-kzwi6 / ( xkbetr + 100000 )

I come across one problem in program RV64A904 :

xkbetr LIKE konp-kbetr

xkwert LIKE komv-kwert

xkwert = 100000 * komp-kzwi6 / ( xkbetr + 100000 )

when komp-kzwi6 = 5151,11 and xkbert = '170.00' then xkwert = 4402.66

why xkwert is 4402.66 ?

as usual calulate, xkwert = 100000* 5151.11 / 100170 = 5142.36.

how this xkbetr +100000 calculate ??

Thank you for you sincerely.