Answer:
lets suppose initial rate of interest we need to find =x
total rate of interest as 1.5x (50%+ (consider 9% as)100%)in decimal it will be 1.5
Total rate of interest = current rate of interest
1.5x=9%
initial rate of interest x= 9/1.5 =6 Answer
to check you can calculate 50% of 6 which will be 3 and later verify
Explanation: