\[\boxed{\mathbf{72.}}\]
\[245 - 1 = 244\]
\[538 - 1 = 537\]
\[614 - 1 = 613\]
\[305 - 1 = 304\]
\[421 - 1 = 420\]
\[851 - 1 = 850\]
\[140 - 1 = 139\]
\[250 - 1 = 249\]
\[320 - 1 = 319\]
\[530 - 1 = 529\]
\[680 - 1 = 679\]
\[410 - 1 = 409\]