Lesson 07: One Hundred Percent | Unit 4: Proportional Relationships and Percentages

Multiple Choice

A city held a tree-planting event and increased the number of trees in their downtown area by 25%. Before the event, they had 48 trees. How many trees do they have now?

• 60

• 50

• 48

• 12

Multiple Choice

A city held a tree-planting event and increased the number of trees in their downtown area by 25%. Scientists have found that trees can make an area 9°F cooler. What percentage is this decrease if the peak summer temperature is usually 90°F?

• 5%
• 15%
• 20%
• 10%

Multiple Choice

A company has decreased the amount of plastic packaging on their product by 25%. If the packaging now weighs 48 grams, what did it weigh before the change?

• 72 grams
• 40 grams
• 50 grams
• 64 grams

Multiple Choice

This year, a herd of bison had a 10% increase in population. If there were 550 bison in the herd last year, how many are in the herd this year?

• 550
• 500
• 660
• 605

Multiple Choice

This year, another herd of bison had a 10% decrease in population. If there are 550 bison in the herd this year, how many bison were there last year?

• 500
• 650
• 700
• 611

Multiple Choice

A construction company used 30% more nails and screws this month than last month. If the company used 560 pounds of nails and screws last month, how much did it use this month?

• 700 pounds
• 800 pounds
• 600 pounds
• 728 pounds

Multiple Choice

Han wants to buy a $30 ticket to a game, but the pre-order tickets are sold out. He knows there will be more tickets sold on the day of the game, with a markup of 200%. How much should Han expect to pay for the ticket if he buys it the day of the game?

• $60
• $120
• $45
• $90

Multiple Choice

Noah was asked to make 32 tissue paper flowers as decorations for a party. He made 125% of that number. How many tissue paper flowers did Noah make in total?

• 32

• 40

• 36

• 50

Multiple Choice

90% of the paper flowers Noah made were used for the party. How many of Noah's flowers were used for the party?

• a) 36

• b) 40

• c) 45

• d) 50

Open Ended

How many of Noah's flowers were not used for the party?