2 decimal places is the second number after the decimal point. So in 13.256 the 5 is the second decimal place. To round, you look at the number to the right of the decimal place you want to round to. So in 13.256 we look at the 6. If a number is greater than or equal to 5 you round up, if the number is less than 5 you round down.
So 13.256 rounded to 2 decimal places is 13.26%
You can only round a number to 2 decimal places if it currently has more than 2 decimal places.
round 2.439 to 2 decimal places = 2.44
132600 = 132600.00 to 2 decimal places
2229.66 to 0 decimal places = 2230
33.487 is already rounded to three decimal places. if it were 33.4829, which is four decimal places, you would round it to the nearest three DECIMAL places, which would be 33.487. So, the answer to your question is; 33.487 is already rounded to three decimal places.
2356164.38 already has only 2 decimal places, so there is no need to round it.
0.938
Leave it as it is because it is already in three decimal places
Rounded to three decimal places, this is equal to 1.397.
146.875 rounded to three decimal places is 147.
8.588 rounded to two decimal places is 8.59.
585.9607377 rounded to three decimal places is 585.961.