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Percent Increase / Decrease

New Value Reference Value%

Reference Value

New Old - Change

Old

*(1 % )New value old value change

New value Reference value*(1 %change)

If in 2001 Cape Town had a population of 2.89million people and the population grew by 4% from 2001 to 2010, what is the population in 2010?

2.89 *(1 .04) 3.01 million million people

$1,097,500 $1,000,000.0975 or 9.75%

$1,000,000

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New Value Reference Value%

Reference Value

New Old - Change

Old

“Percent more / less than”

New value Reference value*(1 %change)

Bentley cost $1,000,000*(1 .20) $1,200,000

The Bentley at $1,200,000 is what percent MORE THAN the Ferrari at $1,000,000?

The Ferrari at $1,000,000 is what percent LESS THAN the Bentley at $1,200,000?

New Value Reference Value%

Reference Value

- Change

1,200,000 1,000,000.20 or 20% more than

1,000,000

-

1,000,000 1,200,000.16667 or 16.67% less than

1,200,000

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“Percent more than / less than”If the Bears have 100 points and the

Packers have 80. By what percentageis the Bears’ score GREATER THAN the Packers’ score?

100 80 20.25 or 25% more than

80 80

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“Percent more than / less than”If the Bears have 100 points and the

Packers have 80, by what percentageis the Packers score LESS THAN the Bears?

80 100 200.20 or 20% less than

100 100

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“Percentage of”

If the Bears have 100 points and the Packers have 80, what percentageof the total points dothe Bears have?

% of (in decimal form)Part

Whole

100 1000.5556 or 55.56%

100 80 180

“Percentage of”

If there are 1100 people who are admitted to DePaul, but only 17% decide to enroll, how many people decided to enroll?

Of the 1100 people admitted, 17% of those or 187 people decided to enroll.

(.17)*(1100 admitted)=187Part

% ofPart

Whole (% of)*(Whole)Part