Oslo Company prepared the following contribution format income statement based on a sales volume of 1,000 units (the relevant range of production is 500 units to 1,500 units):

Sales	$	24,200
Variable expenses	13,400
Contribution margin	10,800
Fixed expenses	7,668
Net operating income	$	3,132
What is the variable expense ratio?Round your percentage answer to 2 decimal places (i.e .1234 should be entered as 12.34). Variable expense ratio__?