-26.1% is the change from 843 to 623
Calculation steps:
[( 623 - 843 ) ÷ 843] x 100 = -26.1%
Formula
Percentage change = [(623 - 843) / 843] x 100
Subtract the new number by the original number
623 - 843 = -220
-220 ÷ 843 = -0.2609727164887307
-0.2609727164887307 x 100 = -26.1%