Simple Percents

The rate is given as a percent (%).  Before using it in the simple interest formula, you must first convert it to a______.

• Fraction

• Decimal

• Ratio

• Dollar Amount

When Lisa was born, her parents put $8,000 into a college fund account that earned 9% simple interest. Find the amount of interest earned after 18 years.

• $720

• $1,080

• $20,960

• $12,960

Roman has 2 red pens in his backpack.  If this is 25% of the total number of pens, how many pens are in his backpack?

• 8

• 5

• 800

• .005

Sam had 9 puppies. After giving some away, Sam had 4 puppies left. What is the percent change in the number of puppies? Round to nearest whole percent if necessary.

• 56% decrease

• 125% decrease

• 56% increase

• 125% increase

Miss Sylvie miscounted and thought she saw 33 children on the bus. When she counted again, she realizes there are actually only 30 students on the bus. What is her percent error?

• 10%

• 9%

• 90%

• 91%

Cary's dad gave her $20.00 to spend on shoes at the mall. Cary spent 85% of the money on one pair of shoes. How much money does Cary's dad get back from his $20.00?

Of the 520 students in Grady Elementary, 65% ride the bus. How mnay students ride the bus?

• 338 students

• 65 students

• 500 students

• 585 students

• 455 students

Hank is buying a shirt that originally cost $25.00. It was on sale two weeks ago for 10% off. Today, it is an additional 20% off the original price. How much is the shirt now?

Lisa's little brother weighed 8 pounds when he was born. He now weighs 36 pounds. What is the percent increase in the boy's weight?

• 350%

• 4%

• 40%

• 78%

It costs a florist $14.50 to grow a dozen roses. She sells a bouquet of a dozen roses for $24.99. What is the markup (percent increase) to the nearest percent?

• 72%

• 42%

• 172%

• 58%