7th Class Mathematics Comparing Quantities Question Bank Comparing Quantities

  • question_answer 13) Last year, the price of petrol was Rs. 65 per litre. Recently, the government decreased the price of petrol to Rs. 61 per litre. What was the percentage decrease in the price of petrol?

    A) \[8\frac{3}{65}%\]                    

    B) \[6\frac{3}{65}%\]

    C) \[6\frac{2}{13}%\]                    

    D) \[6\frac{34}{61}%\]

    Correct Answer: C

    Solution :

    (c) % age decrease\[\text{=}\frac{\text{decrease}}{\text{original}\,\,\text{price}}\text{ }\!\!\times\!\!\text{ 100 }\!\!%\!\!\text{ }\] \[=\frac{65-61}{65}\times 100%=\frac{4}{65}\times 100%=\frac{4}{13}\times 20%\] \[=\frac{80}{13}%\]                  \[=6\frac{2}{13}%\]     

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