0.01
0.55
0.4667
0.6
0.4333
If you're using the American meaning of 'billion,' the answer is thirty. 3 billion divided by 100 million is 30.
Depending upon where you are:In those countries that use the long scale (based on powers of a million), like Europe:1 billion = (10^6)^2 = 10^6 × 10^6 = 10^6 million = 1,000,000 million = 1 million million → 20 million = 20 million ÷ (10^6 × million) billion = 20 × 10^-6 billion = 0.00002 billionIn those countries that use the short scale (based on powers of a thousand plus one), like USA:1 billion = (10^3)^(2+1) = 10^9 = 10^3 × 10^6 = 10^3 million = 1,000 million = 1 thousand million→ 20 million = 20 million ÷ (10^3 × million) billion = 20 × 10^-3 billion = 0.02 billion
0.2033
24.3333
1.2
0.4333
0.75