Proportional Relationships Percent

Diego measured the length of a pen to be 22 cm. The actual length of the pen is 23 cm. Which of these is closest to the percent error for Diego’s measurement?

• 4.3%

• 4.5%

• 95.7%

• 104.5%

Emma went to a local market where she found that 3 apples cost $6. She wants to buy 5 apples for her friend Kai. How much would 5 apples cost?

• $10

• $15

• $12

• $8

Zoe has a piggy bank and she saved 20% of her total savings which is 40 dollars. How much money does Zoe have in total?

• 100 dollars

• 80 dollars

• 60 dollars

• 200 dollars

Luna went to a store which was having a 20% off sale. She wanted to buy a dress that originally cost $50. How much would the dress cost after the discount?

• $30

• $40

• $10

• $45

Aria went to a store which was offering a 15% discount on all items. She wanted to buy a dress that was originally priced at $80. How much would the dress cost after the discount?

• $76

• $68

• $72

• $84

What is the formula for calculating percent change?

• New Value + Old Value / Old Value

• New Value - Old Value / New Value

• New Value * Old Value / 100

• ((New Value - Old Value) / Old Value) * 100

Aria had 50 apples. After a fruitful harvest, she now has 70 apples. Calculate the percent change in the number of apples Aria has.

• 40%

• 10%

• 20%

• 50%

David had 80 apples. He gave some to Grace and Aria, and now he has 60 apples. What is the percent change in the number of apples David has?

• 25%

• 20%

• 30%

• 15%

A store is offering a 20% discount on a shirt that originally costs $50. How much will the shirt cost after the discount?

• $40

• $30

• $35

• $45

A restaurant bill comes to $80. If you want to leave a 15% tip, how much should the tip be?

• $12

• $10

• $15

• $20