Why am I sometimes 1 penny short?

Question

So, I'm supposed to write a program that takes a double value and returns the least amount of change. Everything seems to be okay but when I enter in double values such as "99.99" or "101.10" the answers are just a bit off.

public class Change {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        double amount;
        double remainder;
        int tens = 0;
        int fives = 0;
        int toonies = 0;
        int loonies = 0;
        int quarters = 0;
        int dimes = 0;
        int nickels = 0;
        int pennies = 0;

        System.out.println("Enter in a double value:");
        amount = scanner.nextDouble();

        tens = (int) amount / 10;
        amount = amount % 10;

        fives = (int) amount / 5;
        amount = amount % 5;

        toonies = (int) amount / 2;
        amount = amount % 2;

        loonies = (int) amount / 1;
        amount = amount % 1;

        quarters = (int) (amount / 0.25);
        amount = amount % 0.25;

        dimes = (int) (amount / 0.10);
        amount = amount % 0.10;

        nickels = (int) (amount / 0.05);
        amount = amount % 0.05;

        pennies = (int) (amount / 0.01);
        amount = amount % 0.01;

        System.out.println("tens:" + tens);
        System.out.println("fives:" + fives);
        System.out.println("toonies:" + toonies);
        System.out.println("loonies:" + loonies);
        System.out.println("quarters:" + quarters);
        System.out.println("dimes: " + dimes);
        System.out.println("nickels: " + nickels);
        System.out.println("pennies: " + pennies);


    }
}

output for "99.99"

Enter in a double value:
99.99
tens:9
fives:1
toonies:2
loonies:0
quarters:3
dimes: 2
nickels: 0
pennies: 3

above, I am 1 penny short.

output for "101.10"

Enter in a double value:
101.10
tens:10
fives:0
toonies:0
loonies:1
quarters:0
dimes: 0
nickels: 1
pennies: 4

above, I am one penny short again