-79.85% is the change from 824 to 166
Calculation steps:
[( 166 - 824 ) ÷ 824] x 100 = -79.85%
Formula
Percentage change = [(166 - 824) / 824] x 100
Subtract the new number by the original number
166 - 824 = -658
-658 ÷ 824 = -0.7985436893203883
-0.7985436893203883 x 100 = -79.85%