-50.67% is the change from 971 to 479
Calculation steps:
[( 479 - 971 ) ÷ 971] x 100 = -50.67%
Formula
Percentage change = [(479 - 971) / 971] x 100
Subtract the new number by the original number
479 - 971 = -492
-492 ÷ 971 = -0.5066941297631308
-0.5066941297631308 x 100 = -50.67%