Adam celebrated his eighteenth birthday with friends at a chinese restaurant. the bill came to $287.69 without tax. the service was quite good so he decided to tip the waiter 20 percent. what is the amount of tip that adam and his friends should leave for the waiter?

To find the percent. A trick I learned in middle school was Dr. P

To turn a decimal to a percent and a percent to decimal... (look at picture)

Using that trick...

All you do is multiply $287.69 by .20

Which gives you $57.538 so you can round to either...

$57.54
Or
$57.50
Or
$58

And one of those are your answer!