Math 6 - Lesson 6.5A: Percent of Change

At a post office, the weight of the mail at 10:00 A.M. was 80 pounds. Two hours later, the weight of the mail had increased by 30%. Find the weight of the mail at noon.

• 104 pounds

• 56 pounds

• 10.4 pounds

• 560 pounds

The price of a new car was $22,800 in April. However, the price of the car was reduced by 5% in May. Find the price in May.

• $23,940

• $2,394

• $21,660

• $2,166

One Friday, a restaurant received enough orange juice for a week. After the weekend, the restaurant’s orange juice supply had decreased by 24% to 76 quarts. After Monday, the supply had further decreased by 20%. What was the original amount of orange juice received?

• 94 quarts

• 18 quarts

• none of those

• 100 quarts

One Friday, a restaurant received enough orange juice for a week. After the weekend, the restaurant’s orange juice supply had decreased by 24% to 76 quarts. After Monday, the supply had further decreased by 20%. How much orange juice was left after Monday?

• 60.8 quarts

• 46.2 quarts

• none of those

• 39.2 quarts

Dennis bought an antique model train for $64. Two years later, he sold it for $72. What was the percent increase in the price of the model train?

• 11.1%

• 12.5%

• 18.75%

• none of those

The original length of a spring was 28 millimeters. It was stretched to a length of 35 millimeters. Find the percent increase in its length.

• 20%

• 80%

• 75%

• 25%

The amount of the water in a dispenser was 50 liters at first. After 10 minutes, it decreased to 45 liters. Another 15 minutes later, the amount of water had decreased to 40 liters. Find the percent decrease in the amount of water after the first 10 minutes.

• 20%

• 11.1%

• 10%

• none of those

The amount of the water in a dispenser was 50 liters at first. After 10 minutes, it decreased to 45 liters. Another 15 minutes later, the amount of water had decreased to 40 liters. What was the percent decrease in the amount of water from 45 liters to 40 liters?

• 20%

• 11 1/9 %

• 12.5%

• none of those

On Monday, Camille scored 120 points in a video game and Emily scored 5/4 as many points as Camille. On Tuesday, Emily scored 30% more points than what she scored on Monday. Find the increase in the number of points Emily scored on Tuesday.

• 45

• 36

• none of those

• 156

Find the Percent of Change.  Round to nearest Percent.
From 5 qt  to 18 qt

• 72% Increase
• 260% Increase
• 72% Decrease
• 260% Decrease