Answer: 25 questions on the test
Explanation:
First, 80% divided by 100 becomes a decimal, 0.8.
Next, let x be the total number of problems on the test. We can multiply x by 0.8 and set it equal to 20 as our equation to solve.
0.8 * x = 20
Lastly, we will divide both sides of the equation by 0.8 to find the answer to our question.
x = 25 questions on the test