Joe's mother asks him to answer the door for a pizza delivery and tells him to give the delivery person a 15% tip. The pizza costs $10, and Joe has trouble calculating the tip even with a calculator.
Ben helps the patrons of his shop calculate the price of the clothes they want to purchase, including discounts. He performs all of the calculations in his head.
Sad man teaches about pie fractions and how to read them. Bad man takes the children on a practice run on fraction amounts in a pie chart. A special song is sung to guide the lesson.