Expressions and Percents

A hat costs x dollars and you can use the expression x - 0.20x to find the cost of the hat with a 20% discount. Which of the following would also get you the discounted price?

• 1.2x

• 3x

• 0.8x

• 0.2x

Which expression is equivalent to 6(2x - 3)?

• 12x - 3

• 8x -9

• 8x - 18

• 12x - 18

Which expression is equivalent to 4(x + 6)?

• 4x + 6

• 4x + 24

• x + 24

• 10x + 24

Choose the expressions that shows a $45 dollar watch discounted 25%.

• 45 - .25 = 44.75

• 45 + .25(45) = 1.25(45)

• 45 - .25(45) = .75(45)

• A
• B
• C
• D

• $12.00
• $4.00
• $24.00
• $72.00

A percent is a part-to-whole ratio with a whole of 100. You can write 25% as 25:100 or 25/100​​. Select the correct numbers to complete the sentences.

Caleb gets 20 cents from every dollar, which is 100 cents. The ratio of his earnings is ​ (a)   which is ​ (b)    

Tillie gets 30 cents from every dollar. The ratio of her earnings is ​ (c)   which is ​ (d)  

• 20:100

• 20%

• 30:100

• 30%

The new bottle of sanitizer has 87.5 ounces. This is how many PERCENT OF THE ORIGINAL?

• 75%

• 100%

• 125%

A jewelry supply shop buys silver chains from a manufacturer for c dollars each, and then sells the chains at a 40% markup. Write an expression for the retail price of a silver chain. HINT: There are two answers!

• .6c

• c + 0.40c

• 1.4c

• $40

To find a discount of 30% off of a price of P, which expression should you use to find the final price? HINT: There are two answers!

• 30P

• P - 0.30P

• 0.70P

• 1.70P