Question

It is common on college campuses to relate demographic information about a group of students based on percentages. For example, a freshman class might be described as having 22% students from out of state, 18% international students, and the remainder in-state students.

a) What percentage of students in this freshman class are from in-state? Show how you determined this.

b) Related how this demographic information is an example of percent composition.

Answer 1

In a college total students count should be 100%

22% out of state + 18 % international + in-state = 100%

in state students = 100% - 18%-22% = 60%

b)

This different demographic students are similar to constituents of a chemical composition in percentage.

For example:

CO₂ has 1 mole C atoms and 2 moles O atoms

mole % of C = 1/3 x 100 = 33.33 %

mole % of O = 2/3 x 100 = 66.66 %

total % = 33.33 + 66.66 = 100 %

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