-82.47% is the change from 810 to 142
Calculation steps:
[( 142 - 810 ) ÷ 810] x 100 = -82.47%
Formula
Percentage change = [(142 - 810) / 810] x 100
Subtract the new number by the original number
142 - 810 = -668
-668 ÷ 810 = -0.8246913580246914
-0.8246913580246914 x 100 = -82.47%