15 minutes in decimal is represented as 0.25. To convert minutes into a decimal format, you take the total minutes and divide by 60, since there are 60 minutes in an hour.
Here’s the calculation: 15 minutes ÷ 60 minutes/hour = 0.25 hours.
This means that 15 minutes is a quarter of an hour, which is reflected in the decimal notation of 0.25.