Calculate the Percentage of a Quantity as a Rate per 100

The average number of shirts sold in the shop was 285 every day in summer. As the temperature was lower and lower, the average number of shirts decreased to 114 every day. What was the percentage decrease of in the average number of shirts sold in the shop?

• 60%

• 40%

• 150%

• 171%

The inventory of single houses is 980 in the housing market last year. After some of them were sold, there are 637 single houses left. What was the percentage decrease in the number of single houses?

• 65%

• 35%

• 53%

• 34%

The usual price of a TV set was $500. During the Christmas holiday, the price of a TV set marked down to $413. What was the percentage decrease in the price of a TV set?

• 82.6%

• 87%

• 17.4%

• 25%

Find the percent of change.

From 24 teachers to 30 teachers.

• 25% decrease

• 25% increase

• 20% decrease

• 20% increase

Darren makes $10 per hour. Next semester, he will be making $14 per hour. What rate of increase does this represent? Round the answer to the nearest tenth of a percent.

• 28.5%

• 40%

• 71%

• 60%

Calculate 25% of 80

• 20

• 80

• 48

• 95

What is 15% of 82?

• 12.3

• 123

• 1.23

What is 30% of 50?

• 16

• 16.3

• 17.4

• 15

What is 90% of 250?

• 245

• 225

• 255

• 244.33

What is 42% of 65?

• 23.7

• 25.3

• 27.3