On the basis of the following schedule , calculate price elasticity of demand by the percentage method :
`{:("Price per unit (Rs.)","Total expenditure(Rs.)"),(" "10," "180),(" " 9, " " 162):}`

Find out E_(P) by the percentage method : {:("Price (Rs.)"," Total expenditure(Rs.)"),(" "8," "800),(" "10," "900):}

when price of a good is ₹ 7 per unit, a consumer buys 12 units. When price falls to ₹ 6 per unit, he spends ₹ 72 on the good. Calculate price elasticity of demand by using the percentage method. Comment on the likely shape of demand curve based on this measure of elasticity.

When price of a good is Rs. 7 per unit a consumer busy 12 units . When price fails to Rs. 6 per unit he spends Rs. 72 on the good . Calculate price elasticity of demand by using percentage method. Comment on the likely shape of demand curve based on based on this measure of elasticity.

When price of a good falls by 10 percent , its quantity demanded rises from 40 units to 50 units. Calculate price elasticity of demand by the percentage method.