-48.09% is the change from 971 to 504
Calculation steps:
[( 504 - 971 ) ÷ 971] x 100 = -48.09%
Formula
Percentage change = [(504 - 971) / 971] x 100
Subtract the new number by the original number
504 - 971 = -467
-467 ÷ 971 = -0.48094747682801237
-0.48094747682801237 x 100 = -48.09%