1600000000/20 = 80000000
One half billion divided by 16 is 31,250.
2.88
10
0.0438
0.0938
1
0.032
31,250
0.2857
400,000,000
2.8571
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.