To find the percentage of students who picked a vanilla cupcake, you can use the formula for percentage:

$\text{Percentage} = \left( \frac{\text{Number of students who picked vanilla}}{\text{Total number of students}} \right) \times 100$

In this case, 33 students picked vanilla out of a total of 75 students. Plugging these numbers into the formula:

$\text{Percentage} = \left( \frac{33}{75} \right) \times 100 = 44\%$

So, 44% of the students picked a vanilla cupcake.

Would you like more details or have any questions?

Here are 5 related questions:

1. What percentage of students picked chocolate cupcakes?
2. How many students picked chocolate cupcakes?
3. If 60% of the students picked a vanilla cupcake, how many students would that be?
4. What is the ratio of students who picked vanilla to those who picked chocolate?
5. If there were 10 more students, and all picked vanilla, what would the new percentage of vanilla cupcakes be?

Tip: When calculating percentages, dividing the part by the whole and multiplying by 100 is the key formula.