Table 51 Shows the Change in the Quantity Demanded for a a Product

Multiple Choice

Table 5.1 shows the change in the quantity demanded for a product as a result of a change in the price of the product. Use the information in the table below to calculate the value of the price elasticity of demand.​ Table 5.1
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Quantity
Price
Old
20
$40
New
10
$60
​

A) −2/3
B) −1/3
C) −3/5
D) −5/3
E) 0