What percentage of a day is 3 h?

Correct option is B

Given:
There are 24 hours in a day.
Formula Used:
Percentage = (Part / Whole) × 100
Solution:
The part is 3 hours, and the whole is 24 hours. So:
(3/24) × 100 = 12.5%
Thus, 3 hours is 12½ % of a day.