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Numbers have always existed, and mathematical concepts such as decimals are discovered or developed, rather than invented.

Decimals appear to have been introduced around the 1500s, but not in their current form. Flemish mathematician Simon Stevin is credited with the development of modern decimals. This was seen in a booklet he published in 1585, entitled De Thiende which translates to 'the art of tenths'. Its complete title was Decimal arithmetic: Teaching how to perform all computations whatsoever by whole numbers without fractions, by the four principles of common arithmetic: namely, addition, subtraction, multiplication, and division.

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Q: Who invented decimals and when and where?
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