If you check the Periodic table, to Molar Mass of Sodium Chloride NaCl is 58.3 g/mol.
So, you divide 1 mol over the Molar mass of NaCl which 58.3, and the answer you divide it by 100.
So you get:

You do the Calculations and you get about 1.72 mol of NaCl
Hope this Helps :)