-83.95% is the change from 810 to 130
Calculation steps:
[( 130 - 810 ) ÷ 810] x 100 = -83.95%
Formula
Percentage change = [(130 - 810) / 810] x 100
Subtract the new number by the original number
130 - 810 = -680
-680 ÷ 810 = -0.8395061728395061
-0.8395061728395061 x 100 = -83.95%