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Q.

32 is 40 percent of what number ? 


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a

  12.8

b

  128

c

  80

d

  800 

answer is C.

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Detailed Solution

  Concept: Firstly, assume the required number to be x , and then form an equation as per the given condition.
Assume the number whose  40% is 32 to be x.
As per the question,    40% of x =32
⇒  40100 ×x=32
⇒ x = 32 × 10040
On solving, we get x = 80
Hence, the required number is 3.
 
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