Im justing on my diamonds rings
I don't think that this is for homework but it means stereotyped and stuff.
I’m assuming this is a punctuation question. The correct way would be: Christopher Columbus, born in Genoa, never did reach mainland North America. There should be a comma before and after “born in Genoa”.
It would be 2.5% because you would set it up as 0.5=p x 20 you divide each side by 20 which should equal 0.025. you move the decimal two places to the right so p actually equals 2.5%