10 / 100 * 400 =
0.1 * 400 = 40
Question: What is 10 percent of 400?
Step 1: Divide the percent value (10) by 100.
10 / 100 = 0.1
Step 2: Multiply step one's result (0.1) by the number (400).
Result: 10% of 400 = 40.