• # question_answer 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) $6\frac{34}{61}%$

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