-79% is the change from 824 to 173
Calculation steps:
[( 173 - 824 ) ÷ 824] x 100 = -79%
Formula
Percentage change = [(173 - 824) / 824] x 100
Subtract the new number by the original number
173 - 824 = -651
-651 ÷ 824 = -0.7900485436893204
-0.7900485436893204 x 100 = -79%