-79.78% is the change from 643 to 130
Calculation steps:
[( 130 - 643 ) ÷ 643] x 100 = -79.78%
Formula
Percentage change = [(130 - 643) / 643] x 100
Subtract the new number by the original number
130 - 643 = -513
-513 ÷ 643 = -0.7978227060653188
-0.7978227060653188 x 100 = -79.78%