30 - (30 / 100 * 75) =
30 - 22.5 = 7.50
Question: What is 75% off 30?
Step 1: Get the result of Number (30) / 100 * Percent (75).
30 / 100 * 75 = 22.5
Step 2: Subtract step one's result (22.5) from the number (30).
30 - 22.5 = 7.50
Result: 75% off 30 = 7.50.