Using the percentage concept, it is found that 60% of the students voted to donate a telescope.
The percentage of an amount a over a total amount b is given by a multiplied by 100% and divided by b, that is:
[tex]P = \frac{a}{b} \times 100\%[/tex]
In this problem:
The percentage is given by:
[tex]P = \frac{300}{500} \times 100\% = 60\%[/tex]
60% of the students voted to donate a telescope.
More can be learned about the percentage concept at https://brainly.com/question/10491646