import java.util.Scanner;

public class Prog5 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner console = new Scanner(System.in);

        System.out.println("Welcome to the disemvoweling utility!"); // Initially typed "disemboweling" xD
        System.out.print("Enter text to be disemvoweled: ");
        String inLine = console.nextLine();
        String vowels= inLine.replaceAll("[AEIOUaeiou]", ""); // RegEx for vowel control
        System.out.println("Your disemvoweled text is: " + vowels); // Prints disemvoweled text

    // Used to count all characters without counting white space(s)
    int reducedAmount = 0;
    for (int i = 0, length = inLine.length(); i < length; i++) {
        if (inLine.charAt(i) != ' ') {
            reducedAmount++;
        }
    }

    // newAmount is the number of characters on the disemvoweled text without counting white space(s)
    int newAmount = 0;
    for (int i = 0, length = vowels.length(); i < length; i++) {
        if (vowels.charAt(i) != ' ') {
            newAmount++;
        }
    }

    int reductionRate = ((newAmount - reducedAmount) / reducedAmount); // Percentage of character reduction


    System.out.print("Reduced from " + reducedAmount + " to " + newAmount + ". Reduction rate is " + reductionRate);

    }
}

Welcome to the disemvoweling utility!

Enter text to be disemvoweled: Testing please

Your disemvoweled text is: Tstng pls

Reduced from 13 to 8. Reduction rate is 0