-82.01% is the change from 817 to 147
Calculation steps:
[( 147 - 817 ) ÷ 817] x 100 = -82.01%
Formula
Percentage change = [(147 - 817) / 817] x 100
Subtract the new number by the original number
147 - 817 = -670
-670 ÷ 817 = -0.8200734394124847
-0.8200734394124847 x 100 = -82.01%