-79.6% is the change from 843 to 172
Calculation steps:
[( 172 - 843 ) ÷ 843] x 100 = -79.6%
Formula
Percentage change = [(172 - 843) / 843] x 100
Subtract the new number by the original number
172 - 843 = -671
-671 ÷ 843 = -0.7959667852906287
-0.7959667852906287 x 100 = -79.6%