-50.77% is the change from 971 to 478
Calculation steps:
[( 478 - 971 ) ÷ 971] x 100 = -50.77%
Formula
Percentage change = [(478 - 971) / 971] x 100
Subtract the new number by the original number
478 - 971 = -493
-493 ÷ 971 = -0.5077239958805355
-0.5077239958805355 x 100 = -50.77%