-81.17% is the change from 648 to 122
Calculation steps:
[( 122 - 648 ) ÷ 648] x 100 = -81.17%
Formula
Percentage change = [(122 - 648) / 648] x 100
Subtract the new number by the original number
122 - 648 = -526
-526 ÷ 648 = -0.8117283950617284
-0.8117283950617284 x 100 = -81.17%