Because the Hindu-Arabic numeral system contained a nought figure which made arithmetical calculations a lot easier to work out.
The Hindu-Arabic numeral system (the numbers that we use today:0,1,2,3,4,5,6,7,8,9) replaced the Roman numeral system for calculating because it contained a 0 figure which made calculating a far lot easier than with Roman numerals.
Because the Hindu-Arabic numeral system contained a zero symbol which made mathematical calculations a lot simpler than the Roman numeral system which didn't have a zero symbol.
Use of zero.
Systems which use abbreviations for repetitions of symbols (e.g. Hieratic numerals, Chinese numerals). Then that was replaced with the Hindu-Arabic numeral system (0,1, 2, 3, 4, 5, 6, 7, 8, 9 ...... the system we use today) superceded the Roman numeral system because the four operations of arithmetic was easier to work out i.e. addition, subtraction, division and multiplication. A nought figure was incorporated into the Hindu-Arabic system of counting which made the positional place value of numbers more easily recognisable. Fibonacci popularised Hindu-Arabic numerals to the Western/European/Roman world.
Because the Hindu-Arabic numeral system contained a nought figure which made arithmetical calculations a lot easier to work out.
The Hindu-Arabic numeral system (the numbers that we use today:0,1,2,3,4,5,6,7,8,9) replaced the Roman numeral system for calculating because it contained a 0 figure which made calculating a far lot easier than with Roman numerals.
Because the Hindu-Arabic numeral system contained a zero symbol which made mathematical calculations a lot simpler than the Roman numeral system which didn't have a zero symbol.
Use of zero.
The Hindu Arabic number system was in fact started by Indians, back then known as Brahmi Numerals. They then slowly evolved to become Hindu Arabic numerals.
Systems which use abbreviations for repetitions of symbols (e.g. Hieratic numerals, Chinese numerals). Then that was replaced with the Hindu-Arabic numeral system (0,1, 2, 3, 4, 5, 6, 7, 8, 9 ...... the system we use today) superceded the Roman numeral system because the four operations of arithmetic was easier to work out i.e. addition, subtraction, division and multiplication. A nought figure was incorporated into the Hindu-Arabic system of counting which made the positional place value of numbers more easily recognisable. Fibonacci popularised Hindu-Arabic numerals to the Western/European/Roman world.
The Arabic people needed a numeral system and made figures, numbers. They based their system off of zero and also made negatives that the Roman numerals lack.
The Roman numeral system did work and was capable of addition, subtraction, division and multiplication but it lacked a zero symbol which made arithmetic quite difficult for many people and it was replaced by the Hindu-Arabic numeral system in the Middle Ages which we still use today whose symbols are 0 1 2 3 4 5 6 7 8 and 9
Use of zero as a place holder.
Mayan
The Hindu-Arabic numeral system originated from the Indian subcontinent and its importance was that it included a symbol for zero which made arithmetical calculations a lot easier to work out and the symbols as we know them today are: 0 1 2 3 4 5 6 7 8 and 9
Introduction of the digit 0 as a place holder.