Answer:
4%
Explanation:
Firstly, we are to calculate the amount of euro in dollars. The amount he is supposed to exchange to initially is; 400 * 1.25 = $500
Now he changed for 400 * 1.2 =480
The amount of dollars he received fewer will be 500-480 = $20
We now also calculate the % loss.
That would be 20/500 *100 = 4%