-66.07% is the change from 843 to 286
Calculation steps:
[( 286 - 843 ) ÷ 843] x 100 = -66.07%
Formula
Percentage change = [(286 - 843) / 843] x 100
Subtract the new number by the original number
286 - 843 = -557
-557 ÷ 843 = -0.66073546856465
-0.66073546856465 x 100 = -66.07%