Answer :
1. 65 marks out of 400 marks is 16.25%.
2. 500 m is 25% of 2 km.
3. 40 seconds is 4.17% of 16 minutes.
1. To find the percentage of 65 marks out of 400 marks, we use the formula:
Percentage = (Part / Whole) * 100.
Here, Part is 65 and Whole is 400.
So, we calculate:
(65 / 400) * 100 = 0.1625 * 100 = 16.25%.
2. To determine what percentage of 2 km is 500 m, we first convert 2 km into meters:
2 km = 2000 m.
Now we use the same percentage formula:
(500 / 2000) * 100 = 0.25 * 100 = 25%.
3. For finding what percentage 40 seconds is of 16 minutes, we first convert 16 minutes into seconds:
16 minutes = 16 * 60 = 960 seconds.
Now applying the percentage formula:
(40 / 960) * 100 = 0.04167 * 100 = 4.17%.
