30 - (30 / 100 * 85) =
30 - 25.5 = 4.50
Question: What is 85% off 30?
Step 1: Get the result of Number (30) / 100 * Percent (85).
30 / 100 * 85 = 25.5
Step 2: Subtract step one's result (25.5) from the number (30).
30 - 25.5 = 4.50
Result: 85% off 30 = 4.50.