500 - (500 / 100 * 100) =
500 - 500 = 0
Question: What is 100% off 500?
Step 1: Get the result of Number (500) / 100 * Percent (100).
500 / 100 * 100 = 500
Step 2: Subtract step one's result (500) from the number (500).
500 - 500 = 0
Result: 100% off 500 = 0.