Answer:

Step-by-step explanation:
Given



Orchestral =
of music practice time
Required
Determine time spent on orchestral pieces
From the given parameters, we have:
Orchestral =
of music practice time
Substitute
for music practice time.
So, we have:



the recipocal is 0.17857142857
Well I don’t know what you mean so I’m just gonna simplify it
Image below is simplified answer!