Answer:
The percentage of deaths in relation to the number of cases is 4.55%.
Explanation:
The proportion of deaths is the number of deaths divided by the number of cases(Proporção de mortes é o numero de morte dividido pelo de casos).
The percentage is the proportion multiplied by 100.
In this question:
3739 cases, 170 deaths
170/3739 = 0.0455
0.0455*100 = 4.55%
The percentage of deaths in relation to the number of cases is 4.55%.