What is the full question. I would be able to help if I saw it all.
Answer:
$3.293
Step-by-step explanation:
You would multiply your total amount, 21.95, by your tip divided by 100, so 0.15. It would look like this: 21.95 x 0.15 = 3.293. Therefore, you would give the waitress a $3.293 tip. I Hope This Helps :)
C - Parenthesis first (3-1)=2, then distribute the 4. 4x2=8, next add 5, 8+5=13.