Arithmetic Ability
Percentage

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Q.

 The difference between a number and its two-fifth is 510. What is 10% of that number ?

View Answer

Correct choice: B

Explanation:

Let the number be x. Then, x-(2/5)x = 510 => 3x/5 =510 =>x =[510 * ( 5/3)] =850 10 % 0f 850 = 85.
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