30 - (30 / 100 * 45) =
30 - 13.5 = 16.50
Question: What is 45% off 30?
Step 1: Get the result of Number (30) / 100 * Percent (45).
30 / 100 * 45 = 13.5
Step 2: Subtract step one's result (13.5) from the number (30).
30 - 13.5 = 16.50
Result: 45% off 30 = 16.50.