What is the stamp duty reserve tax when the percentage over total tax revenue is 0.79?
create table table_1618358_1 (stamp_duty_reserve_tax varchar, over_total_tax_revenue__in__percentage_ varchar, PRIMARY KEY (stamp_duty_reserve_tax))
select stamp_duty_reserve_tax from table_1618358_1 where over_total_tax_revenue__in__percentage_ = "0.79"