あなたの国の何％人が英語を話せますか？って英語でなんて言うの？

To ask the percentage of something we would say: "What percentage of people......?" However, this is a rather over-precise and mathematical approach and would appear a little strange in normal conversation. Obviously those precise facts may be found on Google if anyone is that interested! A far more normal query would be: "How many people speak English in your country?"

You can ask, How many people speak English in your country? -or- What percentage of people are fluent in English in your country? -or- How many English speakers are there in your country? By asking, "How many," though, you may end up getting a number instead of a percent. So, you might want to add "percentage-wise" to the end of your question, and this basically means "in terms of percentage."

"What percentage of people speak English in your country." This asks the person to tell you the percent of people that speak English in the country. "Is English a common language in your country." This asks the person to tell you if many people speak English in their country.

*What percentage of the population of your country speaks English? This means that you would like to have an idea if the country they come from has a lot of people that speaks English. For example: A:What percentage of the population of your country speaks English? B: mmmmh. I could say about 80 percent (this means it is an English speaking country)/30 percent (this is a non English speaking country)

When talking about how many people do something we can say what percentage this usually refers to how many out of a hundred so 50 out of 100 is half or 50% you can simply ask 'how many people in your country speak English?' this would tell you how many people not a percent

The main language is the one frequently spoken by the citizens.

Asking someone "How many people can speak English in your country?" would give automatically make the other person understand that you are asking about the percentage, as it is impossible to know exactly how many people speak English! Usually, depending on the person, they might not give you an exact percentage number, but would say something like "a big part or small part". Someone would answer as more than 50%. They go for the numbers ending with 0 or 5, as it is more generalized.. Hope this helps!