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Quantitative Aptitude > Percentage :
Question 1.

What percent of 2 metric tones is 40 quintals?

Options:
  1.    100%
  2.    200%
  3.    500%
  4.    1000%
  5.    None of these
Answer: Option B
 -  1 metric tonne = 10 quintals.

Required percentage = [ (40/(2 x 10)) x 100]% = 200%.

Question 2.

1/2 is what percent of 1/3?

Options:
  1.    100%
  2.    125%
  3.    150%
  4.    175%
  5.    None of these
Answer: Option C
 -  Required Percentage = [ (1/2)x(3/1) x 100]% = 150%

Question 3.

Evaluate: 16 2/3% of 600 gm- 33 1/3% of 180 gm

Options:
  1.    20 gm
  2.    40 gm
  3.    60 gm
  4.    80 gm
  5.    None of these
Answer: Option B
 -  16 2/3% of 600 gm –33 1/3% of 180 gm

= [((50/3) x (1/100) x 600) – ((100/3)x (1/3)x -280)]gm

= (100-60) gm = 40gm

Question 4.

Find the missing figures: ?% of 25 = 2.125

Options:
  1.    7.5
  2.    8.5
  3.    10.5
  4.    11.2
  5.    None of these
Answer: Option B
 -  Let a% of 25 = 2.125. Then , (a/100) x 25 = 2.125 a = (2.125 x 4) = 8.5

Question 5.

Find the missing figures: 0.25% of ? = 0.04

Options:
  1.    10
  2.    12
  3.    14
  4.    16
  5.    None of these
Answer: Option D
 -  Let 0.25% of a = 0.04. Then , 0.25 x  a/100 = 0.04
     
a= [(0.04 x 100)/0.25] = 16

Question 6.

Which is greatest in 16(2/3)%, 2/15 and 0.17?

Options:
  1.    2/15
  2.    16(2/3)%
  3.    0.17
  4.    All equal
  5.    None of these
Answer: Option C
 -  16(2/3)% =[ (50/3) x (1/100)] = 1/6 = 0.166, 2/15 = 0.133.

Clearly, 0.17 is the greatest.