68.83
830 thousandths of an inch
68.83
830 is the simplest form unless you mean 8/30 in which case the answer is 4/15.
Assuming you are meaning 830 grams, then 830 is 83/100 of a kilo, or 83% in the simplest form.
830
830
830
30% of 830= 30% * 830= 0.3 * 830= 249
50% of 830= 50% * 830= 0.50 * 830= 415
42% of 830= 42% * 830= 0.42 * 830= 348.6
830