Given:
Total number of questions = 50
Number of correct answers = 35
Number of wrong answers = Total number of questions - correct answers
= 50 - 35 = 15
Therefore, the number of questions she did not answer correctly = 15
To find the percentage Janet did not answer correctly, use the formula:

Thus we have:

Therefore, the percent of questions Janet did not answer correctly is 30 percent.
ANSWER:
30%