Is this what you are asking for.
Let suppose, US is doing car race for three years and every years your total speed will give you a winner.
First year you join and said, I used to speed in Nepal. OK..What was your speed. 45Km/hr ( Kilometer)
First Year,
Nepalese speed ( Good driver) 45Km/hr....... US driver speed ( excellent road) 45Miles/hr
Second Year-------------60Miles--------''''''''''''' '''' 50Miles/hr
Third Year----------------65Miles............."""""""""""""""""'' 55Miles/hr...
So you want to argue, 45Km/hr speed is equal to 45Miles/hr.
Actually, there is no problem.. thats how the Education Standard System is established.
Just look forward, and be proud they are going to be college in US.