Round each number to the place of the underlined digit. 0.724 the seven is inderlined

The answer is 0.700 or 0.7

So basically, 0.724 is being rounded,

when you are rounding, if the number next to it is less than 5, it stays the same if it is above 5 it increases 1. So we are rounding 7 correct? the number next to it is 2, and 2 is below 5. Therefore 0.724 rounded is 0.700