How do u show the group of digits that repeat in a repeating decimal

Answer 1

To show the group of digits that repeat in a repeating decimal, you can use a horizontal line, called a vinculum, over the repeating group of digits. The vinculum indicates that the numbers underneath it repeat indefinitely. For example, if the decimal 0.333... repeats, you can write it as 0.3̅. Similarly, if the decimal 0.142857142857... repeats, you can write it as 0.142857̅.