Wyatt Oil has the following accounts on its books:

Customer Name Amount Owed

$($$ millions$)$ Age

$($days$)$

Amalgamated Switch and Signal $$1\mathrm{.}564$

Associated Steel $$4\mathrm{.}361$

d'Anconia Copper $$7\mathrm{.}424$

Hammond Motors $$4\mathrm{.}210$

Incorporated Tool $$6\mathrm{.}456$

Rearden Metal $$10\mathrm{.}813$

Summit Casting $$2\mathrm{.}142$

Taggart Transcontinental $$6\mathrm{.}428$

United Locomotive Works $$3\mathrm{.}672$

Wyatt extends credit on terms of $1/15,$ net $30.$

The percentage of Wyatt's receivables that are more than $30$ days past due is closest to: