Reading current from 100amp/50Mv shunt

#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <Adafruit_ADS1015.h>
Adafruit_ADS1115 ads1115;
#define ADS1115_REG_CONFIG_DR_860SPS
#define AVG_NUM 24   //Number of samples to take for ADC reading
#define VOLTS_CHAN0 0 //Batteryv oltage 1
#define VOLTS_CHAN1 1 //Battery voltage 2
LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);
Adafruit_ADS1115 ads;  /* Use this for the 16-bit version */
float Vresults0; // battery voltage
float Vresults1; ///Amps reading
float Vresults2; //only temp will be removed
float Vresults3; //only temp will be removed
float Vresults4; //only temp will be removed
float Vmultiplier = 0.000188;  // used to convet readings this is calculated 
float R1 = 9960.5;    // !! resistance of R1 !!
float R2 = 2700;     // !! resistance of R2 !!


void setup() {
  ads.setGain(GAIN_TWOTHIRDS);  // 2/3x gain +/- 6.144V  1 bit = 3mV      0.1875mV (default)
  ads.begin();  //start the 16bit A/D converter
  Serial.begin(9600);                           // Initialize Arduino to PC Com Port(debug only to be removed on fianl build)
  lcd.begin(20, 4);                              // Initialize the LCD.
  lcd.clear();
  delay(100);
  lcd.setCursor(0, 1);
  lcd.print("Initializing...");                  // Print something on the display to show will be removed debug only
  lcd.setCursor(0, 2); // Print something on the display to show will be removed debug only
  lcd.print("Daves Van Meter"); // Print something on the display to show will be removed debug only
  lcd.setCursor(0, 3); // Print something on the display to show will be removed debug only
  lcd.print("By Dave"); // Print something on the display to show will be removed debug only
  delay(1000); // Print something on the display to show will be removed debug only                                   // it's working.
  lcd.clear(); // Print something on the display to show will be removed debug only                                   // Clear display
  delay(100);

}

/* ========== Main Loop ============================================================= */

void loop() {
  read_data();                                              // Get current and voltage values.
  write_to_lcd();
  //This shall be removed only here for debuging and getiing it working.
  Vresults3 = Vresults0 / (R2 / (R1 + R2)); /// This will be removed and replaced only for testing
  Vresults4 = Vresults1 * 10; //this is wrong 3.75V shows 37.52amps *100 shows 375.2amps

}


/* ========== dsiplay the data ============================================================= */
void write_to_lcd() {
  lcd.setCursor(0, 0);
  lcd.print(Vresults0, 3); lcd.print("Raw V");
  lcd.setCursor(11, 0);                              //
  lcd.print(Vresults1); lcd.print("Raw A ");
  lcd.setCursor(0, 2);
  lcd.print(Vresults3); lcd.print(" Actual V  ");
  lcd.setCursor(0, 3);
  lcd.print(Vresults4); lcd.print(" Actual A  ");

}

/* ========== read easch channel 24 times ======================================================== */
int read_adc(int channel) {
  float sum = 0;
  int16_t temp;;
  int i;

  for (i = 0; i < AVG_NUM; i++) {      // loop through reading raw adc values AVG_NUM number of times
    temp = ads.readADC_SingleEnded(channel);        // read the input pin
    sum += temp;                       // store sum for averaging
    delayMicroseconds(50);             // pauses for 50 microseconds
  }
  return (sum / AVG_NUM);              // divide sum by AVG_NUM to get average and return it
}
/* ========== read chanel ============================================================= */
void read_data(void) {

  Vresults0 = read_adc(VOLTS_CHAN0) * Vmultiplier; //(R2/(R1+R2));    //(R2/(R1+R2)This will replace above calcultaionvoltage reading
  Vresults1 = read_adc(VOLTS_CHAN1) * Vmultiplier ; // current reading.

}

void read_data(void) {

  Vresults0 = read_adc(VOLTS_CHAN0) ;
  Vresults1 = read_adc(VOLTS_CHAN1);

}


void loop() {
  read_data();                                              // Get Raw data for current and voltage  
  write_to_lcd();
  //This shall be removed only here for debuging and getiing it working.
  Vresults3 = Vresults0  *  Vmultiplier;                       //  value in volt  (3,75V ?)
  Vresults4 = Vresults1  *   Vmultiplier * 20.0 ;            //  value in Amps (  3.75 *20 =75 amps)

}