6.1.0: Exercises
- Page ID
- 171713
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In the following exercises, rewrite the percent as a fraction
45%
9.1%
8%
673%
In the following exercises, rewrite the percent in decimal form.
18%
9%
71.2%
934%
Find 35% of 250
Calculate 83.1% of 390
Calculate 3.1% of 500
Calculate 750% of 620
If 40% of the total is 32, how much is the total?
If 3% of the total is 6.32, how much is the total?
If 150% of the total is 61.9, how much is the total?
If 18.1% of the total is 18.5, how much is the total?
13 is what percent of 40?
89 is what percent of 500?
31 is what percent of 73?
593.2 is what percent of 184.5?
36 people in a village of 150 want to install a new splashpad at the local playground. What percent of the village wants to install the new splashpad?
Mitena is enrolled in a movie appreciation course. There are 84 students (including Mitena) in the course. After having the students fill out a survey, the professor informs the students that 45.2% chose horror as their favorite movie genre. How many students in Mitena’s class chose horror as their favorite movie genre? Round off to the nearest integer.
Jadyn’s dorm has a “Rick and Morty night” every Wednesday during the semester. One Wednesday, 27 students from the dorm come to watch the TV show Rick and Morty. Jadyn knows this is 30% of the dorm’s residents. How many students reside in the dorm?
24. Percent Error. When performing a scientific experiment that results in quantities of some sort, such as mass in chemistry or momentum in physics, the percent error is often computed. Percent error, %\(E\), is the percent by which the value obtained in an experiment, the observed value \(O\), is different than the value that was expected, the expected value \(E\), in the experiment. The formula is below.
\(\% E = \frac
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Jim and Kelly are working on a chemistry experiment and expect the result to be 50 grams. However, their result was 48.7 grams. Find Jim and Kelly’s percent error.
25. Percent Error. See Exercise 24 for the definition of percent error.
Hailey and Elsbeth are using an experiment to determine Earth’s gravity. The expected value is \(9.807\text{ m}/{\text{s}^2}\). Their experiment gives them a value of \(9.457\text{ m}/{\text{s}^2}\). Find the percent error for Hailey and Elsbeth’s experiment.