-68.59% is the change from 971 to 305
Calculation steps:
[( 305 - 971 ) ÷ 971] x 100 = -68.59%
Formula
Percentage change = [(305 - 971) / 971] x 100
Subtract the new number by the original number
305 - 971 = -666
-666 ÷ 971 = -0.685890834191555
-0.685890834191555 x 100 = -68.59%