- Since 7 is in the tenths place, 21.79512 is between 21.7 and 21.8
- 21.75 is the midpoint between 21.7 (21.70) and 21.8 (21.80)
- As illustrated on the number line, 21.79512 is greater than the midpoint (21.75)
- Therefore, 21.79512 rounded to the nearest tenth (one decimal place) = 21.8
%20with%20a%20number%20line.png "21.79512 rounded to the nearest tenth (one decimal place) with a number line")
