Table:
team
from
to
regular season record
post-season record

w
l
win %
w
l
win %

texas rangers
2007
2014
664
611
.521
18
16
.529

total
664
611
.521
18
16
.529

Statement: washington's managerial record with the rangers was 664-611.
Question: what was rangers's winning percentage in regular season?
Answer: [0.521]