Percent Increase
What is a 20% increase of 50? Solve using a proportion.
10
New Balance: 60
What is a 25% decrease of 80? Solve using a proportion.
20
New Balance: 60
If a measurement was 10 cm but the actual measurement was 12 cm, what is the percent error? Round to the nearest hundredth.
Answer must be a percent.
17%
Define percent increase and how do you find it?
The difference between the final and initial values of some quantity, expressed as a percentage.
You can find this by subtracting the values and dividing by the original or actual value.
What is the percent proportion?
part/whole = percent/100
If a price increased from $80 to $100, what is the percent increase?
Answer must be a percent.
25%
If a shirt is discounted from $30 to $24, what is the percent decrease?
Answer must be a percent.
20%
A scientist measured the weight of an object as 75 grams but the actual weight was 80 grams. What is the percent error?
Answer must be a percent.
6.25%
Define percent decrease and how do you find it?
Loss of value from the original expressed as a percentage.
Subtract values and divide by the original or actual value.
What is 20% of 318? Solve using a proportion.
x/318 = 20/100
63.6
A population increased from 500 to 600. What is the percent increase?
Your answer must be a percent.
20%
A plant's height decreased 156 cm to 96 cm. What is the percent decrease? Round to the nearest hundredth.
Answer must be a percent.
38%
If a car was supposed to travel 300 miles but only went 270 miles, what is the percent error in distance calculation?
Answer must be a percent.
11%
Define percent error and how do you find it?
The difference between the estimated value and the actual value, written as a percent.
Subtract the values and divide by the actual value.
32 students, or 45 percent of my students, have blonde hair. How many students do I have? Round to the nearest whole student. Solve using a proportion.
32/x = 45/100
71
Mrs. Peterson got into a fender bender and her car insurance increased 25%. If her monthly original insurance cost $150, what will her new monthly insurance be?
$187.50
Mrs. Peterson's vet called and said that her cat, Mowzee, needs to lose 15% of his weight. If he is 25 pounds, what does the vet expected his new weight to be?
21.25 pounds
Charles estimated that he had 150 Class Dojo points, but he actually had 107. What is his percent error? Round to the nearest hundredth.
Answer must be a percent.
40%
What is the difference between a part and a whole in a proportion?
A part makes up the whole. The part represents a portion of the whole.
Out of 23 students surveyed at the PLT Campus, only 3 of them like ghost peppers. What percentage of students like ghost peppers? Round to the nearest hundredth. Solve using a proportion.
Answer must be a percent.
3/23 = x/100
13%
Dylan's math grade increased from a 89% to a 112%. What is the percent increase in his math grade? Round to the nearest hundredth.
Your answer must be a percent.
26%
We are having a stray cat problem in Tampico! The population of stray cats is estimated to be 5,250. Mrs. Peterson's SEL class has been working together and have caught/rehomed 5% of the stray cats. How many stray cats are there now? Round to the nearest whole cat :)
4,987 cats
Mrs. Peterson estimates that she has 27 students with an A in her classes. However, the actual number of A's is 30. What is her percent error?
Answer must be a percent.
9-10%
Give an example of equivalent ratios.
Examples vary.
1/2 = 2/4
321,575 kids in Illinois play Fortnite. That is only 7% of the total players in the United States. How many total players are there in the United States? Solve using a proportion. Round to the nearest whole number.
321,575/x = 7/100
4,593,929