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Mathematics 22 Online
OpenStudy (anonymous):

Finding Percents I have examples of this in my book, but i cant quite seem how to do this. ;-; I need help on questions like "# is what percent of #?" if you could inform me on the steps that would be great :3

pooja195 (pooja195):

See if this helps its just an example |dw:1444588270448:dw|

OpenStudy (anonymous):

? kinda confused ;-;

OpenStudy (anonymous):

so 25/100 im guessing :l

OpenStudy (anonymous):

do you understand how it is set up, though?

pooja195 (pooja195):

Is there a specific question that you have that you need help on ?

OpenStudy (anonymous):

i know your supposed to take the first number and put it as numerator and take second number as denominator, reduce, and change to decimal... but confused on how to go about that. and no i dont have a specific question i just want to know how to do it so i can do it on my own.

pooja195 (pooja195):

Try this 24 is what percent of 32?

OpenStudy (phi):

you can translate A is what percent of B?" to A= x% * B (the is means equals, the % of B means multiply times B)

OpenStudy (anonymous):

okay, with this set up, ignore the decimal for now. if you set it up as is over of, you cross-multiply the "fractions", then divide to isolate x to find the value of the missing number

OpenStudy (anonymous):

i think it would be 24/32 then reduced to 12/16 then 6/8 and then 3/4...

OpenStudy (anonymous):

going with pooja's problem :l

pooja195 (pooja195):

No thats incorrect... we need to make it a fraction or division problem all we need to do is 24/32 and you would divide it

OpenStudy (anonymous):

so .75? and im guessing it would be 75% as the answer?

OpenStudy (anonymous):

24/32 = x/100

OpenStudy (anonymous):

75/100?

OpenStudy (anonymous):

;-;

OpenStudy (anonymous):

kody, you're making it more complex than it needs to be

OpenStudy (anonymous):

/).- k...

OpenStudy (anonymous):

how does i makes it less complex then? ;-;

OpenStudy (anonymous):

this is just what im going from out of the book.

OpenStudy (anonymous):

24/32 = x/100 is the values plugged into the formula. this is how the problem is set up

OpenStudy (anonymous):

is this part clear?

OpenStudy (anonymous):

yeah i guess :l

OpenStudy (anonymous):

you then multiply the first numerator (top) by the second denominator (bottom). and the same with the first denominator and second numerator

OpenStudy (anonymous):

sooo 24*32?

OpenStudy (anonymous):

no. that would be the first numerator and the first denominator

OpenStudy (anonymous):

OH OH OK i sees now

OpenStudy (anonymous):

so i multiply diagonally? ;l so 24*100...???

OpenStudy (anonymous):

yes :)

OpenStudy (anonymous):

and 32 by x

OpenStudy (anonymous):

but whats the x? /).-

OpenStudy (anonymous):

patience, young grasshopper. the lesson is not yet finished :P

OpenStudy (anonymous):

the x would be the 2400?

OpenStudy (anonymous):

the equation should now look like (because you multiplied x by 32) 32x = 2400 (from multiplying 24 by 100). then, you need to isolate the x. you do this by dividing both sides by 32

OpenStudy (anonymous):

/)o_o(\ big words

OpenStudy (anonymous):

ummmm

OpenStudy (anonymous):

equation is a math problem with an equal sign. isolate means to make alone

OpenStudy (anonymous):

k.

OpenStudy (anonymous):

so i divide 2400 by 32?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

ohkai

OpenStudy (anonymous):

75 ;-;

OpenStudy (anonymous):

oh so its 75% YAI IM DONE RITE?

OpenStudy (anonymous):

the answer, 75% was never wrong. just how you were trying to find it

OpenStudy (anonymous):

/).-

OpenStudy (skullpatrol):

All percent problems come down to solving this equation: $$\Huge\frac{x}{100}=\frac{a}{b}$$

OpenStudy (anonymous):

the method you were trying only works on a perfect fraction. something that divides together. what if i'd asked 22 is what percent of 23?

OpenStudy (anonymous):

ohohohohoho ok :3 ty vry much

OpenStudy (anonymous):

i think i gots it now

OpenStudy (anonymous):

okay, lets try another one just to make sure. okay?

OpenStudy (skullpatrol):

|dw:1444590124420:dw|

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