ShmoopTube
Where Monty Python meets your 10th grade teacher.
Search Thousands of Shmoop Videos
Percents Videos 20 videos
Looking to con someone out of 40% of a pizza? You've come to the right place. Just don't try that on us.
Converting percents to decimals is easy: just move the decimal point two to the left. Yep, that's it. To the left, to the left... convertin' th...
If the value of a painting increases by 15 percent every year, what was it worth 5 years ago? Hold up: why would you want to sell it now? In a few...
CAHSEE Math 2.3 Number Sense 173 Views
Share It!
Description:
Number Sense: Drill Set 2, Problem 3. What percentage of the total student population are enrolled in these physical education classes?
Transcript
- 00:03
Here's a shmoopy question for you...
- 00:05
Gigglepuss Clown Academy has 1200 clown-students enrolled.
- 00:09
480 of them participate in mandatory after-school clown sports like egg tossing...
- 00:14
for both distance and accuracy.
- 00:16
Another 320 future clowns are involved in the school's band and musical activities,
Full Transcript
- 00:21
focusing on horns, kazoos and snoggits.
- 00:24
The rest of the clown students are placed in physical education classes...
- 00:28
...learning about such things as how to duck quickly out of the way of a pie,
- 00:31
and how to collapse your body so you can fit inside a clown car with six of your peers.
- 00:38
What percentage of the total student population are enrolled in these physical education classes?
- 00:44
And here are the potential answers...
- 00:50
Okay, let's not get all caught up in the clown humor.
- 00:53
They are funny... and a little sad... but they are thrown in to many test questions
- 00:57
just to distract... and annoy us.
- 01:00
We just have to focus on the numbers. Be strong.
- 01:03
The question already tells us that the TOTAL clown population is 1200.
- 01:07
And it also gives us the break down of this 1200:
- 01:10
480 in sports, 320 in music, and "the rest" in P.E.
- 01:15
So in this two-part question, we have first to calculate the NUMBER in PE.
- 01:20
Simple enough... let's use the equation 480 + 320 + x equals 1200.
- 01:26
If we subtract the 480 and 320 from both sides, we get x = 400.
- 01:32
OK, part one done.
- 01:34
The second part asks for the percentage of PE clowns out of the total.
- 01:38
We now know both numbers, so this should be a cinch.
- 01:41
400 out of the total 1200 clowns are in PE. So we have 400 over 1200...
- 01:47
which simplifies to 4 over 12... which simplifies further to 1 over 3.
- 01:53
If we didn't know that 1/3 was about 33%, we'd divide it out this way:
- 01:58
3 goes into 1 to get point-3... we have 1 left over... and 3 goes into ten 3 times...
- 02:04
...and yeah - it repeats, so it's point-33.
- 02:08
We know that if 1 is 100%, point-33 should be 33%.
- 02:14
Scanning the answer choices... 33% pops right out at us... -- answer B.
- 02:19
We wish you the best of luck in clown school.
- 02:21
Just make sure you attend all your PE classes, so you get good at avoiding pie to the face.
Related Videos
CAHSEE Math: Algebra and Functions Drill 5, Problem 3. Solve the equation.
SAT Math 10.3 Geometry and Measurement. What is the ratio of birds to dogs?
SAT Math 2.1 Statistics and Probability. Which two items have the highest protein to fat ratio?
SAT Math 2.2 Statistics and Probability. What percent of her recommended daily intake of 2000 calories did she consume?
