-40.4% is the change from 844 to 503
Calculation steps:
[( 503 - 844 ) ÷ 844] x 100 = -40.4%
Formula
Percentage change = [(503 - 844) / 844] x 100
Subtract the new number by the original number
503 - 844 = -341
-341 ÷ 844 = -0.4040284360189573
-0.4040284360189573 x 100 = -40.4%