Respuesta :

nilbert
Hi there!

Since the end time is 10:30 and the activity was started 3/4 an hour earlier, we need to subtract 3/4 an hour from 10:30 to get the starting time. 

3/4 hour = 45 min

10:30 - 45 min = 9:45

So, the starting time is 9:45.

Hope this helps!
Start by converting 3/4 of an hour to minutes:

1 hour=60 minutes
3/4 hour=45 minutes

Then, we subtract 45 minutes from 10:30 to get the starting time:

10:30-45 minutes
=10:00-15 minutes
=9:45

The starting time was 9:45