If the midterm and the final is worth a 50% and participation is a 20% and I got a 56% on my midterm what can I get on my final exam test and in participation to pass the class with a 75%
Is this a math class? 
What accounts for the missing 30%?
And I was thinking there was 120% accounted for.
You’re grade isn’t looking to promising regardless of whether which way the % fall unless there is a good reason why you got a 56% like you were away at a funeral. Your low mid-term grade is not only tough to make up ground but it is indicative of having trouble grasping the material.
My suggestion as a former educator is to approach the teacher and ask what you can do to bring up your grade. Be prepared with concrete options. Extra homework. A written paper. Outside work that relates to the class. Something. But barring a deal with the teacher to bend the percentages, you have a deep hole to climb out of