Percent Error
On a 92 point test, a student scored 87 points. Whats is their percent error?
Round to the nearest tenth.
5.70%
There were 160 smarties in the box yesterday, but now there are 116, what is the percentage change?
27.5% decrease
Mrs. Conley asks her class what kind of party they want to have to celebrate their excellent behavior. Out of all the students in the class, 5 want an ice cream party, 7 want a movie party, 10 want a costume party, and the rest are undecided.
If 20% percent want an ice cream party, how many students are in the class?
25 Students
Donovan took a math test and got 35 correct and 10 incorrect answers. What was the percentage of correct answers? (Round to the nearest hundredth)
77.78%
You were supposed to have 147 apples from apples picking. But you picked 192 apples. What's the percent error?
Round to the nearest tenth.
23.40%
What's the percent change from 296 to 76?
Round to the nearest tenth.
73.60% decrease
Challenger Elementary School has 800 students. Every Wednesday, 12%, percent of the students stay after school for Chess Club.
How many students attend the Chess Club on Wednesdays?
96 students attended chess clubs on Wednesdays
There are 28 students in a class. Sixteen of those students are men. What percent of the class are women? (Round to the nearest tenth)
42.9%
The report said that the carpark held 240 cars, we counted 200 parking spaces. What's the percent error?
20%
Nikes stock price has dropped from $160 a share to $115 a share this past month. At the same time, Adidas has itś stock price rise from $60 a share to $78 a share. Which company experienced a larger percent change?
Adidas was 30%
Nike was 28.1%
So Adidas did
Elmer has a collection of 300300300 fossils. Of these, 21\%21%21, percent are fossilized snail shells.
How many fossilized snail shells does Elmer have?
63 snail shells
Jerry, an electrician, worked 7 months out of the year. What percent of the year did he work? (round answer to the nearest hundredth)
58.33%
They forecast 22mm of rain but really got 25mm. What's the percent error?
-20%
A computer cost $875 last year and $745 this year. What is the percent change?
14.85%
A zoo has 15 Emperor penguins. Emperor penguins make up 30%, percent of all the penguins at the zoo.
How many penguins live at the zoo?
50 penguins
Your brother traveled 117 miles in 2.25 hours to come home for school break. What’s the average speed that he was traveling?
52 mph
Sam does an experiment to find how long it takes an apple to drop 2 meters.
The theoretical value (using physics formulas) is 0.64 seconds.
But Sam measures 0.62 seconds.
What is the percent error?
3%
At a supermarket, a certain item has increased from 75 cents per pound to 81 cents per pound. What is the percent increase in the cost of the item?
8%
A baseball pitcher won 80% of the games he pitched. If he pitched 35 ballgames, how many games did he win?
28 Games
It takes 6 cubes to build a staircase with 3 steps. How many cubes will be needed for 11 steps?
66