When you see the number 2,300, you may say to yourself, “That’s two thousand three hundred.” 

You would be right, but Americans have another way to say this number: 

“twenty-three hundred.”

 

For numbers 1,000 to 9,900, you can express them as hundreds, rather than thousands.  Here are some examples:

- 4,300 = forty-three hundred
- $1,500 = fifteen hundred dollars
-9,900 =ninety-nine hundred

We use this convention (way of doing things) with “round” numbers:  4,300 and not 4,321.  For “4,321″ we usually express this in thousands: 

“four thousand three hundred (and) twenty-one.”

 Both are correct and both are commonly used.