Today I learnt about repeating decimals from Kavin. How did I live for 42 years without knowing about the vinculum?

He says he learnt it from the @[100064566015041:2048:AhaGuru Math and Science] lectures he saw during his winter break.

I did not expect to see any development in school level maths, in the thirty years that separate us.

https://en.wikipedia.org/wiki/Repeating_decimal