ORA-01476: Divisor is equal to zero - sql

Question

I have this query that I've been given to fix and I cannot understand why its causing error. I reviewed similar topics involving the max function and the null function but I can't seem to make them work without throwing another error.
select case when count(trlr_num) > 0 then 'Inbounds Need Closed'
else 'All Good'
end as "Inbounds To Be Closed"
from (select t.trlr_num,
r.invnum "Invoice",
to_char(nvl(max(rl.init_rcv_dte), sysdate), 'MM/DD/YY HH:MI AM') as "Begin receive date",
round(sum(rl.idnqty) / sum(rl.expqty) *100, 1) as "% Received%"
from trlr t
join rcvinv r
on t.trlr_num = r.trknum
join rcvlin rl
on r.trknum = rl.trknum
and r.supnum = rl.supnum
and r.invnum = rl.invnum
and r.wh_id = rl.wh_id
join rcvtrk rt
on r.trknum = rt.trknum
and t.trlr_id = rt.trlr_id
and r.wh_id = rt.wh_id
where t.yard_loc_wh_id = 'US_3218'
and rt.rcvtrk_stat <> 'C'
and r.invtyp not in ('PKG', 'XFR')
and (rl.rcvsts <> 'QI' or (rl.rcvsts = 'QI' and t.trlr_seal1 is not null and t.trlr_seal2 is not null))
group by t.trlr_num,
r.invnum
having sum(rl.idnqty) / sum(rl.expqty) = 1
and nvl(max(rl.init_rcv_dte), sysdate) < sysdate -2)