15% of 400 is 60. To calculate this, first find what 10% of 400 is. You can do this easily by simply moving the decimal one place to the left (or dropping a zero), and you'll get 40. To find the remaining 5%, divide 40 by 2 (because if 40 is 10%, 20 must be 5%). Then just add those two numbers together to get 60.
Chat with our AI personalities