For example:
* If the assignment is 10% of your grade: A zero would lower your grade by 10% of the difference between 100 and your current grade. That's 10% of (100 - 87.16) = 1.284. Your new grade would be approximately 87.16 - 1.284 = 85.88.
* If the assignment is 20% of your grade: A zero would lower your grade by 20% of (100 - 87.16) = 2.568. Your new grade would be approximately 87.16 - 2.568 = 84.59.
* If the assignment is 50% of your grade: The impact is much greater. A zero would lower your grade by 50% of (100-87.16) = 6.42. Your new grade would be approximately 87.16 - 6.42 = 80.74.
To calculate your new grade accurately, you need to know the weight (percentage) of the assignment that you received a zero on.