Question

Hi i just like kinda forgot what that line above the two numbers in 2.21 mean. Can you help me?​

Answer 1

it means that what ever is under that line is repeating so it just keeps going ex. 2.212121212121212121212121212121................... and never ends

hope this helps:)

Explanation:

Answer 2

It means .21 never ends like 2.2121212121.....