Percent

A scientist measures a substance to be 75 grams, but the actual weight of the substance is 100 grams. What is the percent error of the scientist's measurement?

• 25%

• 33%

• 20%

• 25.5%

What is the final price of a $150 item after a 10% discount?

• $135

• $140

• $145

• $150

If you receive a 5% raise on a salary of $40,000, what will your new salary be?

• $42,000

• $42,500

• $41,000

• $41,500

A store is having a 15% off sale. If an item costs $90 before the sale, how much does it cost after the discount?

• $76.50

• $77.50

• $78.50

• $79.50

• 10%

• 9%

• 11%

• 12%

• 15%

• 20%

• 25%

• 30%

You are calculating the tip for a meal that cost $85 and you want to leave an 18% tip. How much should the tip be?

• $15.30

• $15.50

• $15.70

• $15.90

If a bookshelf costs $120 before tax and the sales tax rate is 5%, what is the total cost of the bookshelf including tax?

• $126

• $125

• $124

• $127