$\"\"$

Retail price = $24.

Markup percent = 115%.

$\"\"$

$\"\"$ (Substitute 24 for Retail price and 115% for Markup percent)

$\"\"$ (Add percents)

$\"\"$ (Write 215% as a decimal)

$\"\"$ (Divide each side by 2.15)

$\"\"$ (Cancel common terms)

$\"\"$ (Divide: $\"\"$ ) $\"\"$

Wholesale price is $11.16.