Expression and Percentage

A jewelry supply shop buys silver chains from a manufacturer for c dollars each, and then sells the chains at a 40% markup. The expression c + 0.4c represent the new price after markup. Choose another expression for the retail price of a silver chain.

• .6c

• .4c

• 1.4c

• $40

To find a discount of 30% off of a price of P I wrote the expression P - 0.3P. Which other expression could you use to find the final price?

• 1.30P

• 0.30P

• 0.70P

• 1.70P

To find a discount of 15% off of a price of B, I wrote the expression B - 0.15B to represent the final price. Which expression also represents the final price?

• B - 0.85

• 0.85 + B

• 0.15B

• 0.85B

The expression 0.70x calculates what change to x?

• 70% increase

• 70% decrease

• 30% increase

• 30% decrease

The expression 1.80x calculates what change to the value of x?

• 20% increase
• 80% decrease
• 20% decrease
• 80% increase

The expression 1.05x calculates what change to the value of x?

• 50% increase
• 5% increase
• 95% increase
• 95% decrease

A coat is on sale for 35% off. The regular price is p. One way to represent the sale price is 0.65p. Which other expression also represents the sale price of the coat?

• p - 0.35

• p - 0.35p

• p - 0.65

• 35p

A store charges a 8% sales tax on all purchases. The cost including tax can be represented by the expression 1.08x. Which of the following expression also represents the cost of a purchase after tax?

• 0.8x

• 0.08x

• x + 0.8x

• x + 0.08x

The expression 1.10x calculates what change to the value of x?

• 10% decrease
• 10% increase
• 90% increase
• 90% decrease

The expression 1.80x calculates what change to the value of x?

• 20% increase
• 80% decrease
• 20% decrease
• 80% increase