-79.25% is the change from 824 to 171
Calculation steps:
[( 171 - 824 ) ÷ 824] x 100 = -79.25%
Formula
Percentage change = [(171 - 824) / 824] x 100
Subtract the new number by the original number
171 - 824 = -653
-653 ÷ 824 = -0.7924757281553398
-0.7924757281553398 x 100 = -79.25%