How do you guys write the number 2.5 million, numerically (using 0-9s) and commas? 2,500,000 is how I'd do it. Recently, they've changed it so commas a replaced with spaces (2 500 000), but I'd still consider the comma version correct. Anyways... However, around the forum I've noticed people writing numbers in groups of 2s, which doesn't really make sense to me? Is it a common practice somewhere else in the world? Here in USA and Canada, for numbers with 4 or more digits, we use a comma to make the numbers easier to read. From right to left, we group the numbers by 3s then on the left, is the excess digits. This is how we would write the following numbers with commas: 2 = 2 25 = 25 250 = 250 2500 = 2,500 25000 = 25,000 250000 = 250,000 2500000 = 2,500,000 25000000 = 25,000,000 250000000 = 250,000,000 2500000000 = 2,500,000,000 However, I've seen some people from other countries write 250000 as 25,00,00 for example. Can someone clear this up for me? Are they uneducated or is it actually considered correct somewhere in the world? PS: No offense intended.