**We can ask two questions.**

1. How much do I save?

2. If the store rewrites the ad as a "percent off" ad,how would the ad read?

1.The first question addresses what we want to know as shoppers or consumers.

**How much do I save?**

Well, remember two items must be purchased in order to save. In order to make the calculation easier, let us round $14.99 to the nearest cent. Why? The intent of rounding is to have a number close to the original number but easier to work during calculations.

Round $14.99 ---$15.00

If the items are purchased separately, the total is $20 +$20 = $40

If two items are purchased at the same time, the cost is $15 + $15 = $30

Savings ---- Subtract sales total from the original total.

$40 - $30 =

**$10 saved when 2 items are purchased**

**2. Also, it would be nice to know what percent was saved.**

An excellent question for a math class: If the store rewrites the ad as a "percent off" ad, what would the ad say?

An excellent question for a math class: If the store rewrites the ad as a "percent off" ad, what would the ad say?

Let's plug the above numbers into a percent proportion.

Part/whole = % / 100

Part = amount saved; whole = total when purchased separately; percent = unknown

10 / 40 = X / 100

Cross multiply and set up an equation to solve

40X = 1000

Divide both sides by 40

X = 25

Thus, 25% was saved. The ad could possibly read, "Save 25% when you buy 2 or more."

**An alternative method - use the Percent Equation**

Percent * Whole = Part

40X = 10

Divide both sides by 40

X = .25

Change to percent by moving the decimal two places to the right. This is the same as multiplying by 100.

Thus, 25% was saved. The ad could possibly read, "Save 25% when you buy 2 or more."