Chruch Corporation manufactures numerous products, one of which is called Tau-42. The company has provided the following data about this product:

Unit sales (a) 70,000

Selling price per unit $ 56.00

Variable cost per unit $ 40.00

Traceable fixed expense $ 640,000

Assume that the total traceable fixed expense does not change. If Chruch decreases the price of Tau-42 to $52.64, what percentage change in unit sales would provide the same net operating income as is currently being earned at a price of $56? (Round your "Percentage" answers to 1 decimal place.)