[SOLVED] Only get correct on the two first cases of loan calculator

Question

I tried these two solutions for the loan calculator test and got correct on the two first that I could see, but not the three next that is locked, and I really wonder why this does not work?

First try:

int fP = (amount / 100) * 90;
int sP = (fP / 100) * 90;
int tP = (sP / 100) * 90;

if(amount > 0){
System.out.println(tP);
}

Second try:

int payments = 1;

do {
amount = (amount / 100) * 90;
payments++;
} while (payments <= 3);

System.out.println(amount);

Answer 1

That makes sense! Thank you very much! (-:

Answer 2

It's because integer calculation.
This line makes the difference :
amount = amount / 100 * 90;
or
amount = amount * 90 / 100;
For small amount less 100 for example, the result of
amount / 100 becomes 0.
And 0 * 90 is also 0
That's not good.
Change this formular to
amount = amount * 90 / 100;
So it works also for smaller amounts.

Answer 3

Sorry, start of code is this:

import java.util.Scanner;

public class Program {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
int amount = scanner.nextInt();