what is a quarter of an hour

A quarter of an hour is a unit of time that is equal to 15 minutes. It is obtained by dividing one hour into four equal parts, with each part being called a quarter of an hour and equaling 15 minutes. Therefore, a quarter of an hour means 1/4th or 25% of an hour. A quarter of an hour is also used to tell time in quarter hours, with "quarter past" indicating that 15 minutes have passed in the current hour and "quarter to" indicating that there are 15 minutes before the next hour.