Reading Large Numbers

Core concept

In the Indian system, commas separate groups as 3,2 digits from the right (e.g., 12,34,56,789 reads as twelve crore thirty-four lakh fifty-six thousand seven hundred eighty-nine), while the International system groups every 3 digits (e.g., 123,456,789 reads as one hundred twenty-three million...). Converting between the two systems is a useful skill, especially since global statistics and Indian statistics are often reported using different systems.