getConsumingRate function
Implementation
Future<String> getConsumingRate()async{
//total expenses and savings * 100% / income
int expense = await getExpense();
int savings = await getSavings();
int income = await getIncomes();
int percentage = 100;
double consumptionRatePercentage = ((expense+savings)*percentage)/income;
return consumptionName(consumptionRatePercentage.roundToDouble());
}