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  5. Comparing Quantities

8th Class Mathematics Comparing Quantities Question Bank Percentage, Profit and Loss

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

    A)  1% increase                  

    B)  1% decrease

    C)  2% increase                  

    D)  2% decrease

    Correct Answer: B

    Solution :

    (b): Let no. be x 10% increase \[\Rightarrow x\] becomes \[1.1x\] Then 10% decrease \[\Rightarrow 1.1x\] becomes \[1.1x\frac{90}{100}=0.99x.\] \[x\to 0.99x\Rightarrow 1%\]decrease.


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