const turnOverDataList =[
    {
      "turnover_data": [
        {
          "debit_amt": 3089315000,
          "credit_amt": 1663958000
        }
      ]
    },
    {
      "turnover_data": [
        {
          "debit_amt": 215278167000,
          "credit_amt": 272487858350
        }
      ]
    },
    {
      "turnover_data": [
        {
          "debit_amt": 30414730000,
          "credit_amt": 39515585500
        }
      ]
    }
  ]


let { debitAmount, creditAmount } = turnOverDataList.reduce((acc, x) => {
                acc.debitAmount += x.turnover_data[0].debit_amt;
                acc.creditAmount += x.turnover_data[0].credit_amt;
                return acc;
            }, { debitAmount: 0, creditAmount: 0 });

 debitAmount = debitAmount > 0 ? debitAmount : 1;

     const   previousRTP = creditAmount / debitAmount * 100;

console.log(previousRTP)