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 $ $24,500$

Variable expenses $13,500$

Contribution margin $11,000$

Fixed expenses $7,700$

Operating income $ $3,300$

$2.$ What is the contribution margin ratio? $($Round your percentage answer to $2$ decimal places $($i$.$e $\mathrm{.}1234$ should be entered as $12\mathrm{.}34)).$