One billion is written as 1,000,000,000 in numerical form. In words, it is written as "one billion." This is because each group of three zeros in the numerical form corresponds to a specific term such as thousand, million, billion, etc.
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Count the number of zeros and put that as the power of 10 1000000000 has nine zeros so 1000000000 = 109
One billion
2333333333/1000000000
100,000,000
-0.727272727= -(727272727/1000000000)