$${\mathtt{0.05}}{\mathtt{\,\times\,}}{\mathtt{9\,000\,000\,000}} = {\mathtt{450\,000\,000}}$$
Overall, we can conclude that 5% of 9 billion is 450 million
$${\mathtt{0.05}}{\mathtt{\,\times\,}}{\mathtt{9\,000\,000\,000}} = {\mathtt{450\,000\,000}}$$
Overall, we can conclude that 5% of 9 billion is 450 million