Order the following numbers from least to greatest :
2.07, 2 7/10, 2.67,-2.67
and
1.3, 1 1/3, 1.34

You can choose to put all the numbers into decimals or fractions.
In this case, I will put the numbers all in decimals. 
We already have 2.07, -2.67, and 2.67 
in a decimal is 2.7 because 7 is in the 'tenths' place and ten was our denominator
So all of our numbers are 2.7 2.01 2.67 and -2.67
Obviously a negative number will be last and you can line the other numbers to see which is the greatest
2.67
2.70 (if there is nothing there we can always put a zero)
2.01
So the first digit is all 2 so we look at the next digits which are 6, 7, and 0 
You should know how to order those numbers, so do the same here.
-2.67, 2.01, 2.67  (we had to change it back to a fraction) 
Hope that helped :)