25
0.1
0.067
0.069
50
0.3
100
95.2381
Well, 4 divided by 16 is 1/4, so 16 into 400 billion it must be 100 billion times that. That makes it 25 billion. Or if you like, 400 divided by 16 is 25, leading to the same answer.
4
1 Billion/10 = 100 Million.
10 billion