Alright! In order to figure this out, we simply take 15% of $22. First, we must convert 15% to decimal form in order to multiply:
15% ⇒ .15 [Note: Percentages are less than 1]
Then multiply them together:
[22 x .15] = 3.3 or $3.30.
$3.30 is the minimum ideal tip.
And so, $3 isn't a good tip by a margin of 30 cents.