Rounding off decimal numbers

The decimal number can be **rounded off**.

When rounding off to 1 decimal place, look at the 2nd decimal, if the 2nd decimal is a 0/1/2/3/4, leave the 1st decimal as it is. if the 2nd decimal is a 5/6/7/8/9, increase the 1st decimal by 1. (When rounding to 2 decimal places, look at the 3rd decimal, etc)

To one decimal place: 2.4 (because the 2nd decimal is a 2)

To two decimal places: 2.43 (because the 3rd decimal is an 8)

To three decimal places: 2.429 (because the 4th decimal is a 5)