First, write the code to find the maximum growth rate. That part follows our typical algorithm for finding a max.
Now how about the country name?
After the loop, your code can't go back and find the country name because each time through the loop the country name variable is "overwritten" with the new country name entered by the user. So....that means the country name would need to be saved into a variable (like maxRateCountry) as you pass through the loop. In the body of the conditional statement where you save the growth rate to be the maximum so far, also save the country name in maxRateCountry. Each time the maximum rate is overwritten with the new larger rate, then overwrite the country name saved into maxRateCountry.