OpenStudy (anonymous):

1/4 Of the class picks to go outside 3/10 of the class go to the computer lab The rest of the class studies for a exam What percent of the class goes outside?

6 years ago
OpenStudy (owlfred):

Hoot! You just asked your first question! Hang tight while I find people to answer it for you. You can thank people who give you good answers by clicking the 'Good Answer' button on the right!

6 years ago
OpenStudy (anonymous):

find a common denominator so that 1/4 + 3/10 + x = 1 since fractions are just percentages that go to 100% (also written as 1) in the equation 1/4 represents those that pick outside 3/10 represents those that go to the computer lab and x represents those that study for the exam if you solve for x you will get a fraction which can be converted into a percent to convert it into a percent (you may need a calculator) divide the numorator by the denominator of x and multiply it by 100

6 years ago
OpenStudy (anonymous):

1/4 of the class goes outside so 25% of the class goes outside unless the teacher goes by majority vote in which case nobody goes outside

6 years ago
OpenStudy (anonymous):

o whoops the percent that goes outside, bleh i was thinking about those that went to study

6 years ago
OpenStudy (anonymous):

I don't get it i need help solving it

6 years ago
OpenStudy (anonymous):

they already give you the ammount that go outside as 1/4

6 years ago
OpenStudy (anonymous):

I thought so also but then I read it again It's ok your answer would be correct if they asked for the remainder I gave you a medal

6 years ago
OpenStudy (anonymous):

to convert a fraction into a percent, using 1/4 for example you do 1 divided by 4 and then multiply it by 100

6 years ago
OpenStudy (anonymous):

that is 400% then

6 years ago
OpenStudy (anonymous):

if you divide 1/4 you get 0.25

6 years ago
OpenStudy (anonymous):

and 0.25 * 100 is 25 therefore it is 25% of the class

6 years ago
OpenStudy (anonymous):

does this make sense? xD

6 years ago
OpenStudy (anonymous):

No this isn't making anysense sorry

6 years ago
OpenStudy (anonymous):

ok 1/4 Of the class picks to go outside 3/10 of the class go to the computer lab The rest of the class studies for a exam What percent of the class goes outside? since the question asks WHAT PERCENT GOES OUTSIDE, we're only interested in the first section of information they give us: 1/4 of the class picks to go outside the other 3/4 of the class go out to do whatever they want which is split among the exam and the lab, we're not interested in this information using the 1/4 we can convert this into a percent

6 years ago
OpenStudy (anonymous):

converting a fraction to a percent is done by following the equation: \[(fraction) * 100 = percent \] but since a fraction is just dividing two numbers we divide like so.

6 years ago
OpenStudy (anonymous):

and our fraction that we want converted is 1/4 so we solve the equation: \[1\div4 * 100 = percent\]

6 years ago
OpenStudy (anonymous):

= 25%?

6 years ago
OpenStudy (anonymous):

i hope that clears some things up

6 years ago
OpenStudy (anonymous):

yep

6 years ago
OpenStudy (anonymous):

But i don't get what the 3/10 equals?

6 years ago
OpenStudy (anonymous):

take the percent of 3/10

6 years ago
OpenStudy (anonymous):

30% ?

6 years ago
OpenStudy (anonymous):

1/4 Of the class picks to go outside 3/10 of the class go to the computer lab The rest of the class studies for a exam since they say that 3/10 go to the computer lab so if you convert that to percent then that is the percent that go to the computer lab

6 years ago
OpenStudy (anonymous):

which is 30%

6 years ago
OpenStudy (anonymous):

but remember that the question only asks us for those that go outside

6 years ago
OpenStudy (anonymous):

now if had asked what percent went outside AND go to the computer lab then you can take the percent of both and then add them together which results in 55% This means that 55% of the class either went to go to the lab or outside

6 years ago
OpenStudy (anonymous):

what about the exam studying?

6 years ago
OpenStudy (anonymous):

now that takes a bit more algebra, if you read what i first posted when i misread the question, you can solve for the variable x which is a fraction

6 years ago
OpenStudy (anonymous):

now you can see where i got the equation from because try to get the percent of 1. If you do you realize that 1 can be represented as 1/1 and converting that to a fraction gives 100%

6 years ago
OpenStudy (anonymous):

and since the left MUST equal the right of an equation then since 1/4 and 3/10 are already used up then there is a remainning unknown number of students (we call x) that are studying BUT their total must be 100%

6 years ago
OpenStudy (anonymous):

hence the equation becomes: 1/4 + 3/10 + x = 100% = 1

6 years ago
OpenStudy (anonymous):

so if you wanna go beyond the question and figure out what percent of the class is studying you can solve for x and convert it into a percent

6 years ago