To find a certain percentage of a number, just take that number - move the decimal place 2 places to the right (what you are actually doing is dividing by 100), and then multiply the two numbers together.

For example, 40% 0f 88 can be worked out like this:

40 divided by 100 is .44

So:

.44 * 88 = 38.72

And then this means 40% of 88 is 38.72

**For your question, all you need to do is:**

20/100 = .20 or .2

500,000 * .2

This gives you 100,000.

So 100,000 is your answer!