The sales of Paco Rabanne's Eau de Toilette Spray would fall by 11.25%.
The price elasticity of demand measures the impact of price changes on the quantity demanded of good. When t the price elasticity of demand is less than 1, demand is inelastic.
Percentage change in the quantity demanded = price elasticity x percentage change in price
12.5% x 0.9 = 11.25%
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