Percent Increase and Decrease Multiplier

Write a proportion to represent the problem: A streaming channel had 1 million subscribers. The number of subscribers increased by 325% in May. How many subscribers are there now (in May)?

The number of students enrolled in summer school increased by 125% since last year. If 2,500 students enrolled this year, how many students, w, were enrolled last year?

• 2500 = 1.25w

• 2500 = 2.25w

• 2500 = 0.75w

• 2500 = 1.75w

Write a proportion to represent the problem:
A baseball player's batting average decreased 18% since last season. If his current batting average is 0.225, what was his batting average, w, last year?

Write a proportion to represent the problem: A contestant on the Biggest Loser has a 13.5% decrease in his body weight during the weigh in. If his original weight was 295 pounds, what is his weight now?

Increase $90 by 12%

• $10.80

• $102

• $100.80

• $90.12

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

• $90

• $84

• $87.50

• $50

What multiplier represents a 10% increase

• 110%

• 10%

• 1.10

• 1.1

Write down the multiplier used to calculate a 15% increase.

• 15

• 1.5

• 1.15

• 1.015

What multiplier represents a 32.4% increase? (pick 2)

• 32.4%

• 1324%

• 1.324%

• 1.324

• 132.4%

What multiplier represents a 10% decrease?

• 10%

• 90%

• 110%

• 1.10