30 - (30 / 100 * 80) =
30 - 24 = 6
Question: What is 80% off 30?
Step 1: Get the result of Number (30) / 100 * Percent (80).
30 / 100 * 80 = 24
Step 2: Subtract step one's result (24) from the number (30).
Result: 80% off 30 = 6.