# Definition:Decimal Expansion/Historical Note

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## Definition

The idea of representing fractional values by extending the decimal notation to the right appears to have been invented by Simon Stevin, who published the influential book *De Thiende*.

The idea was borrowed from the Babylonian number system, but streamlined to base $10$ from the cumbersome sexagesimal.

## Sources

- 2008: Ian Stewart:
*Taming the Infinite*... (previous) ... (next): Chapter $3$: Notations and Numbers: The Dark Ages?