anonymous
  • anonymous
how to simplify proportions and ratios
Mathematics
chestercat
  • chestercat
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KonradZuse
  • KonradZuse
example?????
anonymous
  • anonymous
well 25 to 15 would that be 5 to 3
KonradZuse
  • KonradZuse
yes correct.

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anonymous
  • anonymous
thanks... what about 7 over 14x
KonradZuse
  • KonradZuse
\[\frac{7}{14x}\]
anonymous
  • anonymous
yes
KonradZuse
  • KonradZuse
just think about normally trying to break down fractions.
KonradZuse
  • KonradZuse
7/14 = ?
KonradZuse
  • KonradZuse
We can also plug in for x.
anonymous
  • anonymous
2
KonradZuse
  • KonradZuse
\[\frac{7}{14 * 2}\]
KonradZuse
  • KonradZuse
7/14 isn't 2.
anonymous
  • anonymous
1/2
KonradZuse
  • KonradZuse
yes, correct. Now what is \[\frac{7}{14 * 2}\]
anonymous
  • anonymous
4
anonymous
  • anonymous
noooo hold on 1/4
KonradZuse
  • KonradZuse
then solve \[\frac{1}{2 * 2}\]
anonymous
  • anonymous
so 1/4
KonradZuse
  • KonradZuse
just remember if it's a bigger # on the bottom, then the bigger number stays.
KonradZuse
  • KonradZuse
there.
KonradZuse
  • KonradZuse
also remembe you can plug in any number to solve. As we see by plugging in 2 we get the same answer both ways.
KonradZuse
  • KonradZuse
remember also that simplifying techniques are the same all over, just need to know the situations. Ratios, as above can be tricky if you dont' think about it.
anonymous
  • anonymous
how would I solve 4xy over 0.25x
KonradZuse
  • KonradZuse
are you making this one up?
KonradZuse
  • KonradZuse
or is it a legit Q?
anonymous
  • anonymous
no it is one of my questions for work.
KonradZuse
  • KonradZuse
I guess we woudl just cancel out.
KonradZuse
  • KonradZuse
\[\frac{4xy}{0.25x}\] \[\frac{4y}{0.25}\]
KonradZuse
  • KonradZuse
always important to see what is in both denom and numerator. Cancelling is HUGE later on in math.
KonradZuse
  • KonradZuse
now how many times does 0.25 go into 4?
anonymous
  • anonymous
idk
KonradZuse
  • KonradZuse
....... count it out. what's .25 x 2?
anonymous
  • anonymous
.25*2= .50
KonradZuse
  • KonradZuse
yup, nowhow much is 4?
KonradZuse
  • KonradZuse
0.25 x # = 4????
KonradZuse
  • KonradZuse
or now that you know 0.5 you could do 0.5 x # = 4? then double it.
anonymous
  • anonymous
im lost sorry
KonradZuse
  • KonradZuse
okay.... 0.25 x 2 = 0.50 0.25 x # = 4???? (0.25 x 2 = 0.50) x # = 4??
KonradZuse
  • KonradZuse
how many times does 0.25 go into 4....
anonymous
  • anonymous
nevermind thank you
KonradZuse
  • KonradZuse
:) so our final answer is???

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