Answer:
The rate at which the loan was given is 4%
Explanation:
Given in question as
The Amount loaned to his niece = $ 1200
Time period of loan = 2 years
Interest calculate at Simple interest method = $96
Now Let the Rate of interest apply = R
So, From Simple Interest formula :
SI =

Or, 96 =

Or, Rate =

I.e Rate = 4%
Hence The rate at which the loan was given is 4% Answer