Answer:
You missed 5 questions.
Explanation:
If you multiply 25 by 4 to get one hundred, the total amount of points, you can find that your 80 out of 100 is your 80%.
I'm assuming that each question is 4 points each because you have to multiply the 25 questions by 4.
100-80 is the percent that you missed.
100-80=20
20÷4=5
You missed 5 questions.
