-40.33% is the change from 843 to 503
Calculation steps:
[( 503 - 843 ) ÷ 843] x 100 = -40.33%
Formula
Percentage change = [(503 - 843) / 843] x 100
Subtract the new number by the original number
503 - 843 = -340
-340 ÷ 843 = -0.4033214709371293
-0.4033214709371293 x 100 = -40.33%