To find out how much time Olivia spent fixing her bicycle, we need to subtract the starting time from the finishing time. Let's assume Olivia starts fixing her bicycle at 9:00 am and finishes at 12:30 pm.
First, let's convert the time to a 24- hour format for easier calculation.
9:00 am becomes 9:00, and 12:30 pm becomes 12:30.
To subtract the starting time from the finishing time, we align the hours and minutes separately.
12/30 - 9/0
Subtract the minutes:
30 + 0 = 30
Subtract the hours:
12 - 9 = 3 Now, we have the result as 3 hours and 30 minutes.
To convert the result to minutes, we multiply the hours by 60 and add the minutes.
3 hours * 60 minutes/hour + 30 minutes = 180 minutes + 30 minutes = 210 minutes.
Therefore, Olivia spent 210 minutes fixing her bicycle.