round to the nearest decimal

what has to be rounded ?pls tell!

I'm thinking you want to know how to round to the nearest decimal.

but...we need to know what decimal place you need to round to.

Here's a pretty general rule that you could apply to your current problem:

If a number is 5 or more, you round up, if it is 4 or less, you round down.

Here's an example:

Round 16.73267541232 to the nearest hundredth.

16.70           ---3, (the number that originally was after 7) is less than 4, so we round it down to zero.

This could also be written as just

16.7