Mathematics
7 Online
OpenStudy (anonymous):
percentage help?
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rishavraj (rishavraj):
solve the equation x*4% = 20
OpenStudy (anonymous):
i'm not exactly sure, i'm not the best at math tbh
rishavraj (rishavraj):
@zylaai whats ur choice..
OpenStudy (skullpatrol):
20 is 4% of what means 20/b = 4%
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OpenStudy (anonymous):
i'm so confused, can you help me understand it?
OpenStudy (anonymous):
i'm not too familiar with this subject at all
OpenStudy (skullpatrol):
Percent means "hundredths" or "divided by 100." @zylaai
rishavraj (rishavraj):
@zylaai think like it is 4% of x = 20..and u have find x
OpenStudy (anonymous):
oh alright, i see.
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OpenStudy (skullpatrol):
So if I say x% I can write this as x/100 this translates to what percent.
OpenStudy (anonymous):
i'm not quite sure, i'm sorry. im really bad at this.
OpenStudy (skullpatrol):
What does percent mean to you @zylaai ?
OpenStudy (anonymous):
percent means that it's part of every hundredth, i believe.
OpenStudy (anonymous):
20 'IS' 4% of what is interpreted as
\[20 = 4percent \times x\]
where per cent meaning per 100
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OpenStudy (skullpatrol):
Correct, and how would you write it?
OpenStudy (anonymous):
oh okay, so basically 20 is equivalent to 4%, @Johnbc
OpenStudy (anonymous):
20 is equal to a relationship of 4$ times a number
OpenStudy (skullpatrol):
Not "equivalent"
OpenStudy (anonymous):
to find that number you must convert your percentage and then solve for x using algebra
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OpenStudy (anonymous):
yes that's where i get confused.
OpenStudy (skullpatrol):
This equation DEFINES a percent:$$\Huge \frac{x}{100}=\frac{a}{b}$$
OpenStudy (skullpatrol):
20 is 4% of what means 20/b = 4%
OpenStudy (anonymous):
convert 4% into its numerical form using what you know 4 percent is 4 per 100 and where per stands for a ratio or rate
OpenStudy (anonymous):
is the answer 200?
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OpenStudy (skullpatrol):
nope
OpenStudy (skullpatrol):
$$\Huge x \%=\frac{x}{100}$$
OpenStudy (anonymous):
No the answer is not 200, try to use the relationship again
OpenStudy (anonymous):
it wouldn't be 50, would it? i'm guessing 500, but that seems a bit steep.
OpenStudy (skullpatrol):
why steep?
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OpenStudy (anonymous):
well considering that 25 is 25% of 100, i would think that 500 would be a bit of a large number for just 20..idk
OpenStudy (skullpatrol):
20 is 4% of what $$\Huge \frac{4}{100}=\frac{20}{b}$$
OpenStudy (anonymous):
500? uhhm
OpenStudy (skullpatrol):
Yes
OpenStudy (anonymous):
Thanks!!!!
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OpenStudy (skullpatrol):
Thanks for trying to learn :-)