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.000005
To find 1 percent of 400 billion dollars, you would first convert 1 percent to a decimal by dividing by 100, which gives you 0.01. Then, you would multiply 0.01 by 400 billion to find the answer. Therefore, 1 percent of 400 billion dollars is 4 billion dollars.
0.00004
To write 400 billion in numbers, you would write it as 400,000,000,000. This is because each comma represents a grouping of three digits in the numerical system. So, 400 billion is written as 400 followed by nine zeros.