-22.67% is the change from 838 to 648
Calculation steps:
[( 648 - 838 ) ÷ 838] x 100 = -22.67%
Formula
Percentage change = [(648 - 838) / 838] x 100
Subtract the new number by the original number
648 - 838 = -190
-190 ÷ 838 = -0.22673031026252982
-0.22673031026252982 x 100 = -22.67%