Percentage Mcqs

Q.  When a number is first increased by 10 % and then reduced by 10 % the number:__________?

a. does not change
b. decreased by 1 %
c. increased by 1 %
d. None of these


ANSWER: See Answer
 
Let the given number be x

Increased Number = (110% of x)

= (110/100 × x) = (11x/10)

Finally reduced number = (90 % of 11x/10)

= (90/100 × 11x/10) = 99x/100

Decrease = (x – 99x/100) = x/100

Decrease % = (x/100 × 1/x × 100)% = 1 %
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