How much will be grade improve?

Question

If my current math grade is 67.31 and I take a test worth 25% of my grade. How much will it increase if I get a 100? I have to have at least a B at the end of the 3rd nine weeks to stay in advanced so I need to know what I can do to improve it. I am positive I will get a 100 on this test because I know the material like the back of my hand.

Answer 1

(0.75)(67.31) + (0.25)(100) = ?