-82.5% is the change from 817 to 143
Calculation steps:
[( 143 - 817 ) ÷ 817] x 100 = -82.5%
Formula
Percentage change = [(143 - 817) / 817] x 100
Subtract the new number by the original number
143 - 817 = -674
-674 ÷ 817 = -0.824969400244798
-0.824969400244798 x 100 = -82.5%