To find the percentage of questions Alice got right on her spelling quiz, we need to divide the number of correct answers by the total number of questions and then multiply by 100.

Alice got 18 questions right out of 25, so the calculation is:

$\text{Percentage} = \left( \frac{18}{25} \right) \times 100$

Now, let's calculate it:

$\text{Percentage} = \left( \frac{18}{25} \right) \times 100 = 72\%$

So, Alice got 72% of the questions right.

Would you like more details on this, or do you have any questions?

Here are 5 related questions to expand your understanding:

1. How would the percentage change if Alice got 20 questions right out of 25?
2. If Alice got 90% correct on a quiz with 40 questions, how many did she get right?
3. How can percentages be used to compare performances across different quizzes?
4. What is the difference between a percentage and a fraction?
5. How would you calculate the percentage of wrong answers Alice got?

Tip: Always divide the number of correct responses by the total possible answers before multiplying by 100 for a percentage!