Help me ples which situation can be modeled by Diagram A and which can be modeled by Diagram B?

Diargam A:

120% of x is holl
( 10% )( 10% )( 10% )( 10% )( 10% )( 10% ) ( 10% 10% )

80% of x 20% of x

Diargam B:

120% of x is holl
( 10% )( 10% )( 10% )( 10% )( 10% )( 10% )( 10% )( 10% )( 10% )( 10% ) ( 10% 10% )
100% of x 20% of x

A. your bill at a restaurant is $68 and you and you want to leave a 20% tip. What is the total amount you will leave?

B. you buy a sweater that is on sale for 20% off of the orignal price. The the sweater cost $28. what was the orignal price?