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Unit 4: The multiplier move

The multiplier idea

Read this before the quizzes

Percent means per hundred

Increase and decrease are one multiplication

What percent is A of B?

The ten percent toolbox

A percent of a quantity

Increase by a percent

Percent fall

Answers and why: the multiplier idea

Percent change and the base

Percent change is change over the old value

Percent of what? Choosing the base

Percentage points and percent

A is more than B, so B is less than A

Percent change of a rate

More than, less than

Two steps with amounts

Answers and why: change and the base

Successive changes and working back

Successive changes multiply

Working back to the original

Repeated change and the return trip

Rise then fall

Working back

Repeated growth

Answers and why: successive changes and working back

Profit, loss and discount

Profit and loss are percents of cost

Markup or margin?

Discounts and discount chains

Markup then discount

Profit percent

Discount chain

Answers and why: profit, loss and discount

Word problems, slips and formula cards

Percent in word problems

Ten slips to watch for

The formula cards

Your pace for this unit

Groups with their own percents

Margin to markup

Answers and why: word problems and slips

Self-check: can you do it?

Percentages, profit and loss, discount. This unit has one move: translate every percent into a multiplier.

Quantitative Aptitude Unit 4: Percentages, profit and loss, discount

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