21 is what percent of 168? proportion

Question

anonymous · Answer

21/168 x 100 = 12.5
Therefore, 21 is 12.5 percent, or one eighth, of 168.

anonymous · Answer

thanks!

anonymous · Answer

your welcome

anonymous · Answer

so .... should I stop replying in the other thread?  are you interested in learning how to do this or do you just want a list of answers?

anonymous · Answer

no im listening

anonymous · Answer

okay so let's say you wanted to know what percent 5 was of 30.

$$ {5 \over 30} = {x \over 100} $$

do you understand that so far?  5 out of 30 is equal to somethig out of 100

anonymous · Answer

Ok so would you write 4% of 350 like this?
4
__
360   =     n
               _____
                 100

anonymous · Answer

350*

anonymous · Answer

almost -- if you start out knowing the percentage, then you're asking a slightly different question -- "4 out of 100" (that's 4%) is equal to how many out of 350?

$$ {4 \over 100} = {x \over 350} $$

anonymous · Answer

oh.. ty

anonymous · Answer

the percentage is always the one over 100 -- it might be the one you know, or the one you're solving for.

anonymous · Answer

4% of 350= 350(.o4)=14

anonymous · Answer

depending on the problem.  For example, let's say someone asked 36 is 56% of what?  That's like saying "56 out of 100, is equal to 36 out of something", so it would be

$$ {36 \over x} = {56 \over 100} $$

anonymous · Answer

The proportion is always 4 numbers, but the one that's "x" just changes based on what piece of information is unknown, that you're trying to compute.

anonymous · Answer

is that making more sense now?

anonymous · Answer

kind of

anonymous · Answer

a percent is always out of 100, so make sure the percentage you're given is the one over 100 if you're given a percentage.  Or, make sure that x is the thing over 100 if the percentage is the thing you're solving for.

anonymous · Answer

how would you write this one,  80% of what number is 15

anonymous · Answer

that's just like the example I gave you above.  can you try using that?

anonymous · Answer

first, how would you write 80% as a percentage?

anonymous · Answer

I mean, as a proportion?

anonymous · Answer

um  n/15=80/100?

anonymous · Answer

almost -- you got the 80/100 right, that's 80 percent.  but 80% is equal to 15 out of some number, so it's 15/n.