Percentage Increase and Decrease Equations

Decrease 300 by 10%

• 330

• 270

• 290

• 310

Increase 400 by 25%

• 425

• 500

• 300

• 375

Increase 36 by 10%

• 32.4

• 39.6

• 46

• 36.1

Decrease 360 by 20%

• 324

• 340

• 432

• 288

Decrease 220 by 5%

• 231

• 215

• 209

• 198

Decrease 800 by 25%

• 775

• 825

• 600

• 1000

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 10% decrease?

• 10%

• 90%

• 110%

• 1.10

50% increase to 200

• 300

• 400

• 800

• 500