Problem in inserting data in to database

I am inserting the data table into the oracle database(i.e, SQL developer). Actually one value of the column in the data table is 69.15 but after inserting it changes into 69.150000000000006. The column type of that column In database is number and the column type in the data table is decimal. Even I changed the column to string in datatable still ot is inserting as 69.150000000000006.Please help me with this.
Thanks and Regars,