Hi!
Imagine these two values on a number line. The further right you go, the more positive you are. The further left you go, the more negative you are.
Let's count from 17, all the way to 33.
17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33.
Now, that's quite a lot of numbers. This means 33 is approximately 16 units or so further right than 17 is.
With this in mind, we can conclusively determine that 33.80 is greater than 17.88.
Hopefully, this helps! =)