Jake used to spend $10 for lunch at a restaurant in Chinatown. The tea

Hello!

Let's set up the old expenditures as an equation to make it easier to visualize

Previously the lunch cost broke down like this:

$10 Lunch + $0 Tea + $2 Tip = $12 Total

$2 was a 20% tip on the $10 lunch because \(\frac{2}{10}\) = 20%

We are told that the lunch price increased by 20%

$10 x 20% = $2

$10 + $2 = $12 is the new lunch price

We are also told that tea now costs $1

$12 Lunch + $1 Tea = $13 Total New Bill

We are also told that this nice man decides to leave the same percentage tip on his now exorbitant bill

He used to leave 20%, so what is 20% of the new total, $13?

20% x 13 = \(\frac{1}{5}\) x 13 = \(\frac{13}{5}\\
\)

Do some quick long division to find that the answer is $2.6

The man now spends $13 on the bill and $2.6 on the tip

$13 Bill + $2.6 Tip = $15.6 Total

The answer is (D)