If david went out to eat and their bill was $26.98, how much of a tip should they leave total if they want to tip 20%?

$26.98 x .20=5.396 tip.  

So, depending if if you need to round to the nearest cent, the tip would be $5.40 + bill $26.98=$32.38 total amount.

If you are rounding to the nearest dollar, the tip would be $6+26.98= $32.98.