-45.21% is the change from 918 to 503
Calculation steps:
[( 503 - 918 ) ÷ 918] x 100 = -45.21%
Formula
Percentage change = [(503 - 918) / 918] x 100
Subtract the new number by the original number
503 - 918 = -415
-415 ÷ 918 = -0.45206971677559915
-0.45206971677559915 x 100 = -45.21%