Application for Student Mark sheet processing

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/resultTextView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textAlignment="center"
        android:textSize="24sp"
        android:layout_marginTop="16dp"
        android:text="Total Score: 0\nPercentage: 0%" />

    <EditText
        android:id="@+id/englishMarksEditText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="English Marks"
        android:inputType="number"
        android:layout_below="@+id/resultTextView" />

    <EditText
        android:id="@+id/mathMarksEditText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Math Marks"
        android:inputType="number"
        android:layout_below="@+id/englishMarksEditText" />

    <EditText
        android:id="@+id/scienceMarksEditText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Science Marks"
        android:inputType="number"
        android:layout_below="@+id/mathMarksEditText" />

    <Button
        android:id="@+id/calculateButton"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Calculate"
        android:layout_below="@+id/scienceMarksEditText" />

</RelativeLayout>

package com.example.myapplication;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {
    private EditText englishMarksEditText;
    private EditText mathMarksEditText;
    private EditText scienceMarksEditText;
    private TextView resultTextView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        englishMarksEditText = findViewById(R.id.englishMarksEditText);
        mathMarksEditText = findViewById(R.id.mathMarksEditText);
        scienceMarksEditText = findViewById(R.id.scienceMarksEditText);
        resultTextView = findViewById(R.id.resultTextView);
        Button calculateButton = findViewById(R.id.calculateButton);
        calculateButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                calculateResult();
            }
        });
    }

    private void calculateResult() {
        int englishMarks = Integer.parseInt(englishMarksEditText.getText().toString());
        int mathMarks = Integer.parseInt(mathMarksEditText.getText().toString());
        int scienceMarks = Integer.parseInt(scienceMarksEditText.getText().toString());
        int totalMarks = englishMarks + mathMarks + scienceMarks;
        double percentage = (double) totalMarks / 3;
        resultTextView.setText("Total Score: " + totalMarks + "\nPercentage: " + String.format("%.2f", percentage) + "%");
    }
}