There are 24 hours in a day, and the time spent in school accounts for about 3/ 12, and the time spent sleeping accounts for about 5/ 12. What percentage of the whole day is left?

Residual time

24-24× 3/12-24× 5/12 = 24-6-10 = 8 (hours)

8/24= 1/3

Or1-3/12-5/12 =1/3.

A: The remaining time accounts for one third of the whole day.