Increasing or Decreasing

_is what of _

Percent Error, and Equations

Word Problems

Increase

12 is what % of 12?

100%

Diego measured the length of a pencil to be about 18 cm. The actual length of the pencil is 20 cm. What is the percent error?

10%

At the beginning of the month, there were 80 ounces of peanut butter in the pantry. Since then, the family ate 0.3 of the peanut butter. How many ounces of peanut butter are in the pantry now?

a. 0.7* 80

b. 0.3 * 80

c. 80-0.3

d. (1+0.3) 80

A

Decrease

5 is what % of 10?

50%

In a video game, Clare scored 50% more points than Tyler. If c is the number of points that Clare scored and t is the number of points that Tyler scored, which equations are correct?

Select all that apply.

A, E

A bicycle is 120 inches long. A car is 75% longer than the bicycle. How long is the car?

210 inches

Joe goes to a cafe. His bill is $5. He leaves $5.35.

What did Joe leave and is it increasing or decreasing?

Tip; increasing

What is 75% of 100?

75

The Bengals were expected to sell 2,750 tickets at their latest football game. They only sold 2,654. What is the percent error? Round to the nearest thousandth.

3.5%

Lin's father is paying for a 30$ meal. He has a 20% off coupon for the meal. After the discount, a 7% sales tax is applied. What does Lin's father pay for the meal? Explain or show your reasoning.

25.68

State whether increasing or decreasing for both tape diagrams

A- Decreasing

B-Increasing

What is 100% of 180?

180

A soccer field is 122 yards long. Han measures the length of the field using a 30-ft long tape measure and gets a measurement of 358 feet, 10 inches. What is the amount of error?

86 inches

The store bought a pair of shoes for $40, and sold it for $80. What percentage was the markup?

150%

Diego bought x pounds of almonds. Lin bought ΒΌ of that.

Decreasing

10 is what % of 50?

20%

A soccer field is 122 yards long. Han measures the length of the field using a 30ft long tape measure and gets a measurement of 358 feet, 10 inches. What is the percent error?

86 inches/4392 inches=.0195=1.95%

Draw a diagram to represent each situation:

a. The number of miles driven this month was a 30% decrease of the number of miles driven last month.

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