How do I round decimals?

So its pretty much like if your rounding reguraly but the only diffrience is that it had a decimal in it or a dot and you always have to remeber to round the big one first

Ok heres how you round decimals example if you have 1.5 you can increase it to 2 let me teach you a trick to do it easy 5 or more raise the score example

1.7 can round up to 2 and 4 or less let it rest example 1.3 you cant round that so it stays the same