Percentage Change Quiz

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.

The usual price of a bracelet was $450. Jenny bought it for $292.50 during a sale. What was the percentage discount?

Mr. Santiago had a salary increase of 5% in August compared to September.

Which statements is true about Mr. Santiago's salary?

• Mr. Santiago's salary in August was 95%.

  Mr. Santiago's salary in September is 100%.

• Mr. Santiago's salary in August was 100%.

  Mr. Santiago's salary in September is 105%.

• Mr. Santiago's salary in August was 100%.

  Mr. Santiago's salary in September is 100%.

• Mr. Santiago's salary in August was 5%.

  Mr. Santiago's salary in September is 10%.

Min Ho was paid $4200 in June. He received a pay increase of $420 in July. How much was the percentage increase in his salary?

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.

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

How do we solve for the percentage change?

• original quantity - new quantity

• increase ÷ original quantity

• decrease ÷ original quantity

• change ÷ original quantity