# Math Help - Rounding off Decimals

1. ## Rounding off Decimals

I know how to round off very decently but I have to ask this question.

I need to round off 242.48407 to the nearest thousandths.

I look at the number to the right of 4 and notice there is a zero there.

Would the answer be 242.484 or 242.485?

Thanks

2. $242.484{\color{red}0}7$

Look at the digit after the thousandth one. If it is larger than or equal to 5, we round up. Otherwise, we round down.

So: $242.484{\color{red}0}7 \approx 242.484$