Answer:
25 questions
Step-by-step explanation:
The answer to this question can be solved by setting up a proportion, or equivalent ratios (fractions). Since we know that 18 questions was equal to 72% correct on the test, we can set up a proportion to find the total number of questions:
[tex]\frac{72}{100}=\frac{18}{x}[/tex], where 'x' represents the total number of questions (or 100%) of the questions on the test.
Cross-multiply and divide: 72x = 18(100) or 72x = 1800
Divide both sides by 72: 72x/72 = 1800/72
Solve for x: x = 25 questions
