-45.5% is the change from 923 to 503
Calculation steps:
[( 503 - 923 ) ÷ 923] x 100 = -45.5%
Formula
Percentage change = [(503 - 923) / 923] x 100
Subtract the new number by the original number
503 - 923 = -420
-420 ÷ 923 = -0.4550379198266522
-0.4550379198266522 x 100 = -45.5%