Hey,

To calculate the percentage, we need to know, from how much of the total marks your have obtained the score of 68. Then, only we can help you in finding your percentage. You can find the percentage yourself by following an example provided below:

Suppose you get 68 marks out of 100 marks, so it will be

68/100*100= 68%

here, * stands for multiplication. You can find your percentage from 200, 150 or any such you want to know by changing the denominator, for example, 68/150*100)