You can put this solution on YOUR website! Typically since you only have 1 decimal place you don't extend it.
If you have more decimal places, you can round up.
So as an example, to the nearest thousandth would be
However, 549.5 does not equal 549.500 because now you're implying that you have that much precision in your measurement where you may not really have it. Like if I was measure my height with a tape measure I could say my height was 76 1/2 inches.
That doesn't mean my height is 76.500 inches because my tape measure doesn't have a precision down to 0.001.
