PERCENTAGE CHANGE

In 2000, your favorite candy cost $1.25 a pack. Now it costs $2.00 a pack. What was the relative change in the price over that time?

• 60%

• 75%

• 50%

• 40%

In a wetland, 400 birds were observed in 2018 and 450 birds were observed in 2019. Find the change of the no. of birds.

• increased by 50

• increased by 12.5%

• decreased by 50

• decreased by 12.5%

The fee of lunch was $40 per head. It becomes $30 per head this year. Find the change.

• decreased by $10

• decreased by 10%

• decreased by 25%

• increased by $10

The fee of lunch was $40 per head. It becomes $30 per head this year. Find the percentage decrease.

• $10

• 10%

• 25%

• -25%

How do we find percentage change?

• 250%

• 150%

• 220%

• 185%

The mass of a box of apples was 24 kg. Some apples were removed from the box and the mass of the box dropped to 21 kg. Find the percentage decrease in the mass of the box.

(a)  

Lia paid $120 for a watch during a sale. The original price of the watch was $200. How much was percentage discount?

(a)  

There were 35 blue pens and 15 red pens in a box. Kiera put 12 more blue pens into the box. Find the percentage increase in the number of pens.

(a)  

Find the new value when $20 is increased by 10%

• $21

• $22

• $30

• $40