Q: Passage: Protestantism is the largest grouping of Christians in the United States with its combined denominations collectively accounting for about half the country's population or 150 million people. Simultaneously, this corresponds to around 20 % of the world's total Protestant population. America has the largest number of Protestants of any country in the world. Baptists account for about one third of American Protestants. The Southern Baptist Convention is the largest single Protestant denomination in the United States with one-tenth of American Protestants.

Question: Based on this passage, how many protestants are in the united states?
Let's give stream of consciousness below
The relevant information is: Protestantism is the largest grouping of Christians in the United States with its combined denominations collectively accounting for about half the country's population or 150 million people. So the answer is about half the country 's population or 150 million people.