| Places | Tens | Ones | Tenths | Hundredths | |
|---|---|---|---|---|---|
| 1 | |||||
| Number | 2 | 1 | . | 8 | 6 |
| Rounded Number | 2 | 1 | . | 9 |
- 8 is in the tenths place and 6 is in the hundredths place
- Since the digit in the hundredths place (6) is greater than or equal to 5, add 1 to the digit in the tenths place (8)
- 1 + 8 = 9, so the digit in the tenths place becomes 9
- The digit in the hundredths place is dropped
- 21.86 rounded to the nearest tenth (one decimal place) = 21.9
