0.0938
15
One half billion divided by 16 is 31,250.
15
0.0438
31,250
2.3333
15 ÷ 16 ÷ 3 = 0.3125
15
0.0068
0.0032
62500000000
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.