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                                    If ratio of Change in quantity `(DeltaQ)` to original quantity Q is 0.5 and elasticity of demand is (-) 1.25, calculate the percentage change in price. | 
                            
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Answer» Given: `(DeltaQ)/Q= 0.5` (Positive Value indicated that quantity has increased. It means , new price is less than the original price, i.e price has decreased.) Percentage Change in Demand = `(DeltaQ)/Q xx 100 = 0.5 xx 100 = 50 %` price Elasticity of Demand `(E_(d)) = ("percentage change in Quantity Demanded")/(" Percentage change in price ")` `(-) 1.25 = (50%)/("Percentage change in price ")` Percentage change (fall) in price = 40 %  | 
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