Suppose that you are taking a course where the total class grade is the weighted average of your homework, worksheets, quizzes and tests. The homework is worth 15% of the course grade, worksheets are worth 20% of the course grade, the quizzes are worth 25% of the course grade, and tests are worth 40% of the course grade. To get a B in the course, you must have an overall average of at least 80%.

Your current grades in each category are:

Homework =
80
%, Worksheets =
78
%, and Quizzes =
53
%.

What is the minimum test average you need to get a B in the course?.

Your answer is:
% (Round to at least 1 decimal place)