Write in decimal notation 35 233/1000

Is that 35 and 233 over 1,000? If so, the 35 remains there since it's a whole number and 233/1,000 isn't greater than 1. 233/1,000 is the same thing as 0.233. That means that all you need to do is add 35 + 0.233.
35 + 0.233 = 35.233.