Answer:
3/8
Step-by-step explanation:
First,
convert 3/4 of an hour to minutes;
If 1 hr = 60 mins
then 3/4 of 1hr = [tex]\frac{3}{4} *60\\ \\ =45 mins.
Next,
If 1/2 of 3/4 was spent practicing recital piece, it means that it is half of 45 mins;
1/2 *45 = 22.5 mins
Lastly, convert the 22.5 mins into a fraction of an hour;
22.5/60 = [tex]\frac{3}{8}[/tex]