Answer :
Answer:
Step-by-step explanation:
28 problems are 80 percent of the exam
28 = .80 x where 'x' is the number of exam questions
28 / .80 = x 35 questions on the exam
Answer: 35 Questions
Step-by-step explanation:
Create a proportion to represent the problems and percentage with 80% = 0.80 and 100% = 1:
[tex]\frac{Correct}{Total} =\frac{28}{x}=\frac{.80}{1} \\28 = .8x\\/.8=/.8\\x = 35[/tex]