The browser shows the data incorrectly for NUMBER datatype. It shows commas instead of decimal.
EX: 0.630566 is shown as 0,630566
"Numeric Characters" settings is set to use , as the decimal separator.
WORKAROUND 1:
Go to View | Options | General and check the "Numeric Characters" settings and adjust setting accordingly.
Use these options to set the decimal and thousands separator for display purposes. Both must be set, and they must be different. Options in the drop downs for both include:
, (comma)
. (period)
(space)
WORKAROUND 2:
Check the NLS_NUMERIC_CHARACTERS and NLS_LANG of Oracle session and and database.