To be clear, I do not need a solution. I also do not have the wording correct as this is from a Japanese math workbook.
What area of Mathematics would you place this under? (I want to find workbooks in English with similar questions):
"There are 3 departments at a university: x, y and z.
Department z accounts for 23% of the total number of students in all departments.
Department y is 5/6 the size of department x.
What percentage of the total number of students does x make up?"
Thank you!