If b/c = 1.25, then c is what percent of b?

Question

A) 0.008
B) 0.08
C) 0.8
D) 8
E) 80

ENGRTOMBA2018 · Answer

You are given , b/c =1.25 ---> c < b but only 'just'. This eliminates A-C as you are asked % and as such these values will be further reduced by 1/100, making them even smaller.

Also, as c is "close" to 'b', eliminate D and mark E as the correct answer.

Alternatively, 1.25 = 5/4 ---> b/c=5/4 --> c = 4/5 (b) = 0.8b ---> c = 80% of b. E is the correct answer.

jaspreets · Answer

Hi GMAT club members,

I have done this question in this way :

b/c = 125/100 
b/c=5/4

we need to figure out c is what % of b? --- c/b * 100
c=5 , b = 4
 
5/4 = .80 * 100 = 80

And thanks Engr2012 , I liked your first approach as it's more time effective then mine..

anudeep133 · Answer

Solution:  x% b = c ==> x*b/100 =c ==> x = 100(c/b) = 100/1.25 = 80

Option, E

iikarthik · Answer

We are given B/C=1.25
 C is what % of implies C/B %. As we already have value for B/C, to find C/B just invert B/C

1/(B/C)=1/1.25=0.8

Now convert 0.8 to percentage

0.8 =0.8*100=80%

Karastoyanov · Answer

Did it in 50 sec, so maybe it will be helpful for somebody:

1) b/c=1,25=5/4 => 5c=4b => c=4b/5
2) we are given that c=xb/100 (x is what we are looking for)
3) replace c in step 2 with c=4b/5 in step 1 => 4b/5=xb/100 => 400b=5bx => 400=5x => x=80

So, E is the answer

LeoN88 · Answer

b/c = 125/100 = 5/4

So, 4/5 is 4*20%= 80% (1/5= 20%)

If b/c = 1.25, then c is what percent of b?

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