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Comment on 44 Percent of W
I did .44w and 4.444w. I then
When you say "cancel out the
When you say "cancel out the w's" you are suggesting that we divide both quantities by w. There's a problem with this approach of dividing both quantities by a VARIABLE (w).
First, we don't know whether or not w = 0. If w were to equal 0, then dividing by w means we are dividing by zero, which is never a good thing.
Second, we don't know whether or not w is NEGATIVE. If w is NEGATIVE, then dividing by w means we are dividing by a NEGATIVE value, which we shouldn't do with QC questions.
For more on this, watch https://www.greenlighttestprep.com/module/gre-quantitative-comparison/vi...
Got it.
The necessary caveat we must always find in a question like this is that w>0.
If not, (D).
Thnx!
Exactly!
Exactly!
hi Mr Hanneson,
I have a doubt in this question
at side A it is clearly mention "Percent" of, while on the B side its just mentioned "of". there is no mention of the word "percent" on the B side. how did you assumed that 4/9 is asked as a percent of W.
PLEASE CLARIFY.
REGARDS
Hi Abdul,
Hi Abdul,
In quantity B, 4/9 is a fraction (not a percent).
However, there is a strong relationship between fractions and percents. In fact, in the following lesson, we examine how to convert fractions to percents: https://www.greenlighttestprep.com/module/gre-arithmetic/video/1077
For example, the FRACTION 1/2 is equal to 50 PERCENT. So, 1/2 of Q is equal to 50% of Q.
Likewise, the FRACTION 3/4 is equal to 75 PERCENT. So, 3/4 of Y is equal to 75% of Y.
In the video question above, the FRACTION 4/9 is equal to 44.444...PERCENT.
So, 4/9 of W is equal to 44.444...% of W.
Does that help?
Cheers,
Brent
Hi in the above problem, it
Please correct me if I'm wrong.
It depends whether we're
It depends whether we're working with DECIMALS or PERCENTS.
For example, 1/2 = 0.5 = 50%
So, the DECIMAL 0.5 is equal to the PERCENT 50%
In the DECIMAL conversion, 1/9 = 0.1111111111...
In the PERCENT conversion, 1/9 = 11.1111111111...%
If we want to approximate, we can say 1/9 ≈ 0.11 ≈ 11%
For more on fraction/decimal/percent conversions, watch https://www.greenlighttestprep.com/module/gre-arithmetic/video/1077
Does that help?
Cheers,
Brent
hii brent,
in the first quantity if we convert 44% of w we get 0.44 w also in quantity b if we do 4/9 of w we get 0.44w then wont it be option c?
Be careful.
Be careful.
4/9 is APPROXIMATELY equal to 0.44
In the DECIMAL conversion, 1/9 = 0.1111111111..., where the 1's go on forever.
So, if we want to be precise (which is required for this question), we must recognize that 4/9 = 0.4444444444.....
Does that help?
Cheers,
Brent