Find the Percent of a Number

A tank of water starts the day with 12 gallons. By the end of the day, the tank of water has 8.4 gallons. What was the percent of change of the water in the tank?

• 30% increase

• 30% decrease

• 70% increase

• 70% decrease

Terry earned $10 per hour during the first month of his new job. By the 6th month, he was earning $15 per hour. What was the percent increase for his earnings?

• 1.5%

• 5%

• 33%

• 50%

Deedee's family ate at a restaurant. The bill was $44.20. If they tipped waitstaff 20%, how much was the tip?

• $8.84

• $4.88

• $8.48

• $8.88

There are 453 students eating lunch in the cafeteria. Of those, 308 students brought lunch from home. Which equation can be used to determine the percent of students who brought their lunch from home?

• 453 = x*308

• 308 = x*453

• x = 4.53*308

• x = 3.08*453

Adrian and his family are enjoying a vacation in the wild west. One place they really want to visit is the Grand Canyon. The total distance they will drive is 400 miles. If they have already driven 280 miles, what percent have they driven?

• 68%

• 70%

• 30%

• 43%

Mary collected 765 baseball cards. But, while cleaning her room one afternoon, she lost 153 of those cards! Which equation can be used to find the percent of her cards that she lost?

• 153 = x*765

• 612 = x*765

• 765 = x*153

• 765 = x*612

Isaac has finished 9 problems on his math study guide. This is 75% of the problems. Which is the best equation to determine how many problems are on the entire study guide?

• 9 = 0.75*x

• x = 0.75*9

• 0.75 = 9*x

• x = 75 * 9

There are 36 quarters in my coin collection. If 45% of my coin collection is quarters, how many total coins do I have?

• 75%

• 75 coins

• 80%

• 80 coins

62 is 90.5% of what number?

• 68.51

• 6850.83

• 6850.8

• 68.5

The number of people signed up for a bus trip increased from 32 to 45. What is the percent increase? Round to the nearest percent.

• 52%

• 41%

• 42%

• 45%