American GDP is 16,768.05billion usd, about 16 trillion dollars. Japanese Yen‘s and 1600 trillion yen if $ 1 100 yen,
China is about $ 10 trillion, Japan $ 5 trillion, that’s Japanese Yen 1000 trillion yen and 500 trillion yen, now China is twice the GDP of Japan.
And the total GDP of the world is about $ 75 trillion. This means that only about 20% America.