-19.8% is the change from 808 to 648
Calculation steps:
[( 648 - 808 ) ÷ 808] x 100 = -19.8%
Formula
Percentage change = [(648 - 808) / 808] x 100
Subtract the new number by the original number
648 - 808 = -160
-160 ÷ 808 = -0.19801980198019803
-0.19801980198019803 x 100 = -19.8%