-19.7% is the change from 807 to 648
Calculation steps:
[( 648 - 807 ) ÷ 807] x 100 = -19.7%
Formula
Percentage change = [(648 - 807) / 807] x 100
Subtract the new number by the original number
648 - 807 = -159
-159 ÷ 807 = -0.1970260223048327
-0.1970260223048327 x 100 = -19.7%