A college professor teaches a class of 80 students. Fourteen students are business majors, six are education majors and the rest are undecided. What percentage of the class is undecided?


Given :

Total number of students in the class $= 80$

Number of students from business majors $=14$

Number of students from education majors $=6$


To do :

We have to find the percentage of the class that is undecided.


Solution :  

$Number of students undecided =$

$\Rightarrow  Number of students in the class - (Number of students in business majors  + Number of students in education majors)$

$Number of students undecided = 80 - (14 + 6)$

                                                         $ = 80 - 20$

                                                         $ = 60$

$Undecided percentage in class = \frac{Number of students undecided}{Total number of students in class}\times 100$

                                                        $ = \frac{60}{80} \times 100$

                                                        $= \frac{6}{8} \times 100$

                                                         $= \frac{3}{4} \times 100$

                                                        $ = 3 \times 25$

                                                         $ = 75$%


Therefore, the percentage of class undecided is 75%.

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Updated on: 10-Oct-2022

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