What is the proportion of equity compensation plans approved by security holders to the total number of securities to be issued upon exercise of outstanding options and rights?
{"": {"Number of securities to be issued upon exercise of outstanding options and rights": "(a)", "Weighted-average exercise price of outstanding options and rights": "(b)", "Number of securities remaining available for future issuance under equity compensation plans (excluding securities reflected in column(a))": "(c)"}, "Equity compensation plans approved by security holders": {"Number of securities to be issued upon exercise of outstanding options and rights": 445000.0, "Weighted-average exercise price of outstanding options and rights": 2.34, "Number of securities remaining available for future issuance under equity compensation plans (excluding securities reflected in column(a))": 1780505.0}, "Equity compensation plans not approved by security holders": {"Number of securities to be issued upon exercise of outstanding options and rights": 500000, "Weighted-average exercise price of outstanding options and rights": 1.19, "Number of securities remaining available for future issuance under equity compensation plans (excluding securities reflected in column(a))": "\u2014"}, "Total": {"Number of securities to be issued upon exercise of outstanding options and rights": 945000.0, "Weighted-average exercise price of outstanding options and rights": 1.39, "Number of securities remaining available for future issuance under equity compensation plans (excluding securities reflected in column(a))": 1780505.0}}
equity_compensation_plans_approved_by_security_holders = df["Equity compensation plans approved by security holders"]["Number of securities to be issued upon exercise of outstanding options and rights"]
total_number_of_securities_to_be_issued_upon_exercise_of_outstanding_options_and_rights = df["Total"]["Number of securities to be issued upon exercise of outstanding options and rights"]
answer = equity_compensation_plans_approved_by_security_holders / total_number_of_securities_to_be_issued_upon_exercise_of_outstanding_options_and_rights