Question

say you have 78% in a class and you take a final that is worth 15% & you totally fail, what would your % after you fail?

Answer 1

i will not fail .. lolz .:)

Answer 2

\((1-0.15) \cdot 0.78 + 0.15 \cdot x\)
Put your test grade in as \(x\) and evaluate.

Answer 3

lets say total exam is for 100. For 85 marks you scored 78% . and for 15 marks you scored 0.

calculate what is 78% of 85. you should get 66.3 marks. and so over all percent is 66.3 %

@yakeyglee equation says the same thing.