Reading Decimal Number System

We know how to read any number without decimal point like,

8430 is read as Eight Thousand Four Hundred Thirty 

But when it appears after decimal point then,

0.8430 need to be read as Point Eight Four Three Zero.

Why I can't read it as Point Eight Thousand Four Hundred Thirty?

Answer is pretty simple one!

After decimal point, places are referred as 1/10, 1/100, 1/1000 & so on; not Thousands,Hundreds etc.

So reading in thousands & hundreds are only valid for the numbers before decimal point not after.