-79.3% is the change from 826 to 171
Calculation steps:
[( 171 - 826 ) ÷ 826] x 100 = -79.3%
Formula
Percentage change = [(171 - 826) / 826] x 100
Subtract the new number by the original number
171 - 826 = -655
-655 ÷ 826 = -0.7929782082324455
-0.7929782082324455 x 100 = -79.3%