Acri Corporation manufactures numerous products, one of which is called Omicron09. The company has provided the following data about this product:

Unit sales (a)	100,000
Selling price per unit	$ 78.00
Variable cost per unit	49.00
Contribution margin per unit (b)	$ 29.00
Total contribution margin (a) (b)	$ 2,900,000
Traceable fixed expense	2,480,000
Net operating income	$ 420,000

Assume that the total traceable fixed expense does not change. If Acri decreases the price of Omicron09 to $71.76, what percentage change in unit sales would provide the same net operating income as is currently being earned at a price of $78.00? (Your answer should be rounded to the nearest 0.1%.)