30 - (30 / 100 * 66) =
30 - 19.8 = 10.20
Question: What is 66% off 30?
Step 1: Get the result of Number (30) / 100 * Percent (66).
30 / 100 * 66 = 19.8
Step 2: Subtract step one's result (19.8) from the number (30).
30 - 19.8 = 10.20
Result: 66% off 30 = 10.20.