Percents Summative

Percents Summative Review

Conversions

• Fraction to Decimal: Divide the Fraction

• Decimal to Percent: Multiply by 100

• Percent to Decimal: Divide by 100

• Decimal to Fraction: Multiply by 100. Write number divided by 100. Simplify

Example:

• Convert 0.4 to a percent.

• Convert 60% to a fraction.

• Convert 5/10 into a percent.

Multiple Choice

Convert 0.34 into a percent.

• 56%

• 46%

• 34%

• 16%

Multiple Choice

Convert 78% into a fraction.

• 79/100

• 40/70

• 35/80

• 39/50

Multiple Choice

Convert 34/40 into a decimal

• 0.95

• 0.85

• 0.67

• 0.34

Percent Equation

• Part = Percent * Whole

• Be sure the Percent is written as a decimal

Example

• 21 is what percent of 30?

• What is 32% of 25?

• 3 is 12% of what number?

Multiple Choice

21 is what percent of 35?

• 89%

• 60%

• 18%

• 57%

Multiple Choice

Haley sold 136 tickets to a football game. Her and her friends sold a total of 320 tickets. What percent of tickets sold were Haley's?

• 68.2%

• 38.5%

• 57.5%

• 42.5%

Multiple Choice

Sandra has completed 20% of her required training for her job. The total job training is 60 hours. How many hours has she completed?

• 300

• 24

• 12

• 120

Sales Tax, Tips, Mark-ups, Discounts.

• Find the percent of the total amount.

• Add or subtract this number from the total.

Example

• Shane bought $109 dollars worth of games. With tax being 8.5%, how much did he pay?

Multiple Choice

Lilly bought a plane ticket for $330. She got a discount on her ticket for 24%. How much was the ticket before tax?

• $250.80

• $409.20

• $79.20

• $260.78

Multiple Choice

The bill for dinner is $37. We want to leave a 20% tip. How much should the tip be?

• $6.40

• $44.40

• $7.40

• $29.60

Multiple Choice

You go out to dinner with some friends. Your bill comes up to $5.60. You have to pay tax which is 8.5% and a tip which is 18%. How much did you pay?

(First calculate tax then tip)

• $7.17

• $6.08

• $1.09

• $0.48

Percent of Change

• Higher number - Lower number.

• Divided by the original.

Example

Sandra has 8 apples. Sandras mom gives her 3 more apples for a total of 11 apples. What is the percent of change? Is this Increase or Decrease?

Multiple Choice

Last year we won a basketball team won 12 games. This year they have won 9 games. What is the percent of change?

Was this a percent increase or percent decrease?

• 50% Decrease

• 50% Increase

• 25% Decrease

• 25% Increase

Multiple Choice

On our first week at work we worked 22 hours. The second week we worked 30 hours. What is the percent of change?

Was this a percent increase or percent decrease?

• 36% Increase

• 36% Decrease

• 26% Increase

• 26% Decrease

Multiple Choice

Last year gas was $1.07, today gas was $2.86. What was the percent of change?

Was this a percent increase or percent decrease?

• 167% Decrease

• 167% increase

• 132% increase

• 132% Decrease

Simple Interest

• I = prt

• I = Interest Earned

• p = Principal (Starting Amount)

• r = Interest Rate (Write as a decimal)

• t = Time (In years)

Example

Lilly puts $2000 into a savings account. The account pays 6% simple interest. How much interest will they earn in 3 months?

Multiple Choice

Andy buys a Xbox series X for $500 on his credit card. If after one month he owes $7.92 in interest. What is his interest rate?

• 20%

• 19%

• 7%

• 10%

Multiple Choice

Dee took out a $1000 loan. With a 20% interest rate they earned 150 in interest. How much time has passed?

• 9 months

• 9 years

• 8 months

• 5 years