-50.05% is the change from 971 to 485
Calculation steps:
[( 485 - 971 ) ÷ 971] x 100 = -50.05%
Formula
Percentage change = [(485 - 971) / 971] x 100
Subtract the new number by the original number
485 - 971 = -486
-486 ÷ 971 = -0.5005149330587023
-0.5005149330587023 x 100 = -50.05%