30 - (30 / 100 * 25) =
30 - 7.5 = 22.50
Question: What is 25% off 30?
Step 1: Get the result of Number (30) / 100 * Percent (25).
30 / 100 * 25 = 7.5
Step 2: Subtract step one's result (7.5) from the number (30).
30 - 7.5 = 22.50
Result: 25% off 30 = 22.50.