-5.25% is the change from 971 to 920
Calculation steps:
[( 920 - 971 ) ÷ 971] x 100 = -5.25%
Formula
Percentage change = [(920 - 971) / 971] x 100
Subtract the new number by the original number
920 - 971 = -51
-51 ÷ 971 = -0.05252317198764161
-0.05252317198764161 x 100 = -5.25%