-47.79% is the change from 971 to 507
Calculation steps:
[( 507 - 971 ) ÷ 971] x 100 = -47.79%
Formula
Percentage change = [(507 - 971) / 971] x 100
Subtract the new number by the original number
507 - 971 = -464
-464 ÷ 971 = -0.47785787847579814
-0.47785787847579814 x 100 = -47.79%