Fix Percent vs. Unitless Error in isentropic_example.py
Fix Percent vs. Unitless Error in isentropic_example.py

Unidata/MetPy,dopplershift/MetPy,jrleeman/MetPy,ShawnMurd/MetPy,ahaberlie/MetPy,Unidata/MetPy,dopplershift/MetPy,ahaberlie/MetPy,jrleeman/MetPy