Saki had 27 questions he answered 19 correct

What is his score

19 * 100 / 27 = 70 %

is his score in percent. I do not know if you are using letter grades or whatever.

Divide.

19/27 = 0.7037 = 70%

To calculate Saki's score, you need to determine the scoring system being used for the questions. If each question is worth 1 point, then his score would be 19. However, if each question has a different point value, you will need to know the point value assigned to each correct answer. Can you provide more information about the scoring system?