What is the score if total question is 85 and correct is 68?

You can find percentages like this by taking the total number of questions dividing it by 100 to find out how much each question was worth, then multiplying by the number correct.

So, 85 : 100 ≈ 1.18

1.18 x 68 ≈ 80

So, the score was 80%.