If the combined GDP of the six countries has grown by 50% in the last decade, then what was their combined annual Gross Domestic Product (in billion USD) before 10 years?

If the combined GDP of the six countries has grown by 50% in the last

1.	If the combined GDP of the six countries has grown by 50% in the last decade, then what was their combined annual Gross Domestic Product (in billion USD) before 10 years?
A.	540
B.	180
C.	240
D.	200
Answer» D. 200