Losing data by converting int to float

Hi everyone who reads this,

I'm writing a easy code that handles change(as in money) so that it tells how much your change is and in how many of each bills to give back (like 20's 10's 5's etc...)

When I compile the code it gets that warning that "convertion from into to float may cause data loss" and I do.
Sometimes the output will be correct and give me the right amount, but sometimes I lose a penny in the process and end up being short one penny.

EX: Price = 12.34
Tendered = 20.00

Change: 7.66

Five: 1
Dollars: 2
Quarters:2
Dimes:1
Nickles:1
Penny: 0

The actual output is bit longer than that but you get my point. I's missing that 1 penny and I can't figure out what my problem is x.x I think it might how I set up the
calculating process.
If someone can look at my code and maybe point out where my problem is and what I should do to fix it that would be greatly appreciated.

Code:

// // ChangeCounter.c // // // Created by Batnyagt Batsuren on April 20,2013 // Copyright (c) 2013 Batnyagt Batsuren // #include <stdio.h> #include <stdlib.h> #include <math.h> #define EXIT_SUCCESS 0 #define EXIT_FAIL -1 int main(void) { //variables int change_Twenties = 0; int change_Tens = 0; int change_Fives = 0; int change_Dollars = 0; int change_Quarters = 0; int change_Dimes = 0; int change_Nickels = 0; int change_Cents = 0; float input_Price = 0.0; float tender_Amount = 0.0; float change_Amount = 0.0; //prompts for item price printf("Thank You for using my Change Counter \n"); printf("Please enter price in dollars and cents: \n $ "); scanf("%f", &input_Price); //prompts for amount tendered printf("Please enter tendered amount: \n $ "); scanf("%f", &tender_Amount); //calculating change amount change_Amount = tender_Amount - input_Price; //If inputed tender amount is smaller than price, if (change_Amount < 0) { printf("Please enter a value that's greater or equals to price of item.\n"); getchar(); getchar(); return EXIT_FAIL; } // sets each variable to the correct amount of each and takes away the amount from change cents change_Cents = (change_Amount * 100.0); printf("%d cents \n", change_Cents); //change 20's change_Twenties = (change_Cents / 2000); change_Cents %= 2000; //change Tens change_Tens = (change_Cents / 1000); change_Cents %= 1000; //change dollars change_Dollars = (change_Cents / 100); change_Cents %= 100; //change quarter change_Quarters = (change_Cents / 25); change_Cents %= 25; //change dimes change_Dimes = (change_Cents / 10); change_Cents %= 10; //change nickels change_Nickels = (change_Cents / 5); change_Cents %= 5; //debug printf("$%5.2f \n", input_Price); printf("$%5.2f \n", tender_Amount); printf("$%5.2f \n", change_Amount); printf("%d Twenties \n", change_Twenties); printf("%d Tens \n", change_Tens); printf("%d Fives \n", change_Fives); printf("%d Dollars \n", change_Dollars); printf("%d Quarters \n", change_Quarters); printf("%d Dimes \n", change_Dimes); printf("%d Nickels \n", change_Nickels); printf("%d Cents \n", change_Cents); getchar(); getchar(); return EXIT_SUCCESS; }