OK this is the answer you get when you divide those numbers but you can't have a decimal so I changes 838 into 850 and I got a 34 that's what I needed because I had to get the answer of 33.52 rounded to the nearest whole after that I subtracted 850 and 838 to see how much did I have to add to get 850 and I got the answer of 12
so that means 12 is your answer
