A period of 4 hours 30 minutes is what percent of a day?

18.75%

16.33%

20%

None

A complete day i.e 24 hours is 100%.

24 hours = 24 × 60 minutes = 1440 mins

4 hours, 30 mins = 270 mins

1440 mins = 100% of the day

270 mins = ?

= 270 × 100 / 1440

= 18.75%

4 hours and 30 minutes is 18.75% of a day.