Percentage


  1. If length and breadth of a rectangle became half and double respectively, then what will be the resultant area ?











  1. View Hint View Answer Discuss in Forum

    According to the question,
    Change in length of rectangle = - 50% = a
    Change in breadth of rectangle = 100% = b
    Net effect = a + b + (ab)/100 %

    Correct Option: E

    According to the question,
    Change in length of rectangle = - 50% = a
    Change in breadth of rectangle = 100% = b
    Net effect = a + b + (ab)/100 %
    = - 50 + 100 + [(-50) (100) / 100]%
    = 0%


  1. Two number are respectively 20% and 50% more than a 3rd number, What is the percentage of 2nd with respect to 1st?









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    III     II       I   
    100 150 120
    Required percentage = (150/120) x 100%

    Correct Option: A

    III     II       I   
    100 150 120
    Required percentage = (150/120) x 100% = 125%



  1. In order to pass in an exam, a students is required to get 780 marks out of the aggregate marks. Sonu got 728 marks and was declared failed by 5%. What are the maximum aggregate marks a student can get in the examination ?











  1. View Hint View Answer Discuss in Forum

    Let the maximum marks be N .
    According to the question,
    Then, 780 - 728 = 5% of N

    Correct Option: A

    Let the maximum marks be N .
    According to the question,
    Then, 780 - 728 = 5% of N
    ⇒ 52 = 5% of N
    ∴ N = 5200/5 = 1040


  1. Reena got 76 marks in Hindi, 48 marks in science, 84 marks in Mathematics, 38 marks in Social Science and 72 marks in English. The Maximum marks of each subjects was 100. How much over all percentage of marks she got ?











  1. View Hint View Answer Discuss in Forum

    Total marks obtained = (76 + 48 + 84 + 38 + 72) = 318
    Maximum marks = 5 x 100 = 500

    Correct Option: C

    Total marks obtained = (76 + 48 + 84 + 38 + 72) = 318
    Maximum marks = 5 x 100 = 500
    ∴ Requirred percentage = (318/500) x 100 % = 63.6 %



  1. A saves 20% of his monthly salary. If his monthly expenditure is ₹ 6000 then his monthly saving is ?









  1. View Hint View Answer Discuss in Forum

    Saving = 20%
    Expenditure = 80% = ₹6000

    Since 80% is 6000 so 20% would be 6000/4 = ₹1500

    Correct Option: C

    Saving = 20%
    Expenditure = 80% = ₹6000

    Since 80% is 6000 so 20% would be 6000/4 = ₹1500
    Hence net saving per month = ₹1500