Question

Out of 5200 students of a school only 80% passed. Find how many students failed.

Answer 1

You were so close.
You found 80% of 5200 students, but that is the percentage of the students who passed. Since 80% of the students passed, 20% students should be ones who failed.

20% = 0.2
Therefore, 5200 x 0.2 = 1040

1040 students failed. :)

Answer 2

You are close but you got the ones who passed,but not the ones who failed I divided 80/100×5200/1 =4160 you subtract that from the total 5200 which is 1040 :-| 1040 had failed