5% of 2,870,000 is 143,500. How I got 143,500? Ok. when you are asked the percentage of a number, in this case, 5 percent of 2,870,000. you multiply the percentage being asked. 2,870,000
Try it in your calculator so you can check the answer. Always remember that when you are given this figure, for example 5%, you need to remove the % sign, add one zero to the left and add a decimal point thus: .05.
If you are asked for 10%, remove the % sign and then just add a decimal point before the number 1, to signify that it's just a percentage of the whole.