Solving Problems About Percent Increase or Decrease

12% of $90

• $12

• $78

• $10.80

• $102

Increase $90 by 12%

• $10.80

• $102

• $100.80

• $90.12

Kate scored 54 out of 60 in her maths exam. What is this as a percent?

• 0.9

• 54%

• 90%

• 60%

A book is advertised as 20% off. If it cost $70 at the register, how much was it originally?

• $90

• $84

• $87.50

• $50

My dog's weight is now 125% of what she weighted one year ago. If her weight then was 30kg, what is her weight now?

• 31.25

• 30.125

• 37.5

• 37.125

Decrease 500 by 30%

• 470

• 350

• 499.70

• 150

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 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%

Darren makes $10 per hour. Next semester, he will be making $14 per hour. What rate of increase does this represent?

• 28.5%

• 40%

• 71%

• 60%

The number of people signed up for a bus trip increased from 32 to 45. What is the percent increase? Round to the nearest percent.

• 52%
• 41%
• 42%
• 45%