I am totally confused as to the right use of "percentage"! I have seen certain of the following in various texts, I do not know whichever I can safely use in my own text, though.
Which of the following is/are absolutely correct, academically speaking?
- The percentage of x and y
- The percentages of x and y
- The percentage of x and of y
- The percentages of x and of y
Secondly, shall I use plural or singular verbs after it/them? Thank you.