A survey of 1000 people was done by New York Times. 80 percent of the people don’t not know the name of their representative of Congress. How many of the 1000 people knew the name of congressman

Answer 1

If 80% did not know the names of their representative, that means 20% did know (because 100% - 80 % = 20%). So now all you need to know is what 20% of 1000 is. There are two easy ways to do this. First, you could do it in your head, this is the way that's probably easiest (10% of anything means you move the decimal point one place to the left: so for 1000.0 you move the decimal point left one place and that gives you 100.00, then multiply by 2 to get 200 (100*2 = 200). The other way to do this is to use a calculator. To find a percentage of a number, do the following: convert the percent to a decimal (to do this you move the decimal point two places to the left, so 20.0% = .2) then multiply be the number you want to take a percentage of. So .2*1000 is finding 20% of 1000. Do this in your head or on a calculator, you should get 200.

So: 200 people out of 1000 (20%) knew their congressional representative.