Percent Word Problems

Discounts and Percent Word Problems

Thursday, February 24th​

Multiple Choice

In a circle, which ratio is equivalent to pi?

• radius to area

• diameter to area

• area to circumference

• circumference to diameter

Let's Refresh!!​

​How to Change a Percent to a Decimal

*Change the percent sign to a decimal and it move it to the left 2 places.

​

32% = .32 or 0.32 64% = .64 or 0.64​

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Let's Refresh!

​How to Change a Decimal to a Percent

*Move the decimal 2 places to the left and change it to a percent symbol.

​

0.85 = 85% 0.72 = 72%​

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Discounts

When something is discounted, it means that it costs less than 100% of the total value.

​Examples:

If something is discounted 30% than that means that it still costs 70% of the original cost. ​

If something is discounted 65% than it still costs 35% of the original cost.​

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Subject | Subject

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​Discount Word Problem

Tom bought a shirt that is $25 after a 40% discount. What was the cost of the shirt before the discount? ​

Subject | Subject

Multiple Choice

A pair of shoes is $40 after a 20% discount. What was the original price of the shoes?

• $80

• $60

• $50

• $40

Multiple Choice

A jacket is $68 after a 20% discount. What was the price of the jacket before the discount?

• $85

• $75

• $80

• $110

Discounts (Continued)

Sam bought a tv for x dollars. Two years later the value of the tv was 0.65x. How can we describe the change in value?

a) 0.35% decrease

b) 0.65% decrease

c) 35% decrease

d) 65% decrease​

Subject | Subject

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Multiple Choice

Ms. Martin bought a boat for x dollars. One year later the value of the boat was 0.78x. What is another way to describe the change in value of the boat?

• 78% decrease

• 0.78% decrease

• 0.22% decrease

• 22% decrease

Representing a Percent of an Unknown

1) Represent 60% of an unknown number

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2) Represent 75% of an unknown number​

Subject | Subject

Multiple Choice

Which expression represents 85% of a number?

• 85x

• 0.85x

• 15x

• 0.15x

Multiple Choice

Which expression represents 40% of a number?

• 0.4x

• 0.6x

• 60x

• 40x