-79.84% is the change from 645 to 130
Calculation steps:
[( 130 - 645 ) ÷ 645] x 100 = -79.84%
Formula
Percentage change = [(130 - 645) / 645] x 100
Subtract the new number by the original number
130 - 645 = -515
-515 ÷ 645 = -0.7984496124031008
-0.7984496124031008 x 100 = -79.84%