Question

John and his family went out to eat at their favorite restaurant's the bill for the food was $65 and I left a 20% tip for the server what was the total cost of the meal including tip

Answer 1

Well 10% is $6.50, so just multiple that by 2 and you get your fill tip of $13. Then you just add them together and you get $78.

Answer 2

Multiply
65×.20=13
then add
65+13=78