Looking at the following table of account information, which percentage of debt is less than a month old?

$\backslash$table$[[$Customer$,\backslash$table$[[$Amount of the$],[$Account$]],\backslash$table$[[$Number of Days$],[$Outstanding$]]],[$A$,$$$15,000,90],[$B$,$$$2,333,85],[$C$,$$$3,457,12],[$D$,$$$10,000,45],[$E$,$$$12,050,15],[$F$,$$$575,5]]$

a$.37\%$

b$.50\%$

c$.63\%$

d$.23\%$