How do I figure out my semester grade if each test is a different %

My first test is 29% of my grade
Second test is 29% of my grade
And third test is 34% of my grade

My first test I got a 90, second I got an 87 and third I got a 96... What's my grade?

Hey,

Your percent does not equal 100. So this will only account for 92% of it.

.29(90) + .29(87) + .34(96) = 83.97% out of a possible 92%

So your grade is 83.97% / 92% which is approximately 91.3%