You know how to find the percentage of marks obtained from examination?. If you don't know, i will explain with simple calculator. There are different medium to calculate % of marks., example: calculator, digital medias etc. Calculation of percentage of mark using common formula,You know how to find the percentage of marks obtained from examination?. If you don't know, i will explain with simple calculator. There are different medium to calculate % of marks., example: calculator, digital medias etc. Calculation of percentage of mark using common formula,