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8th Class Mathematics Comparing Quantities Question Bank Comparing Quantities

  • question_answer
    A number is increased by 10% and then it is decreased by 10%. Find the net increase or decrease percent.

    A)  Decrease by 1%

    B)  Decrease by 10%

    C)  Increase by 2%

    D)  Increase by 11%

    Correct Answer: A

    Solution :

    Let the number be 100 Increased number =100+10% of 100=110 Now, this number is decreased by 10% \[\therefore \] New number \[=110-10%\] of \[110=99\] Net decrease \[=100-99=1\] \[\therefore \]Net percentage decrease \[=\left( \frac{1}{100}\times 100 \right)%=1%\]


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