-68.28% is the change from 971 to 308
Calculation steps:
[( 308 - 971 ) ÷ 971] x 100 = -68.28%
Formula
Percentage change = [(308 - 971) / 971] x 100
Subtract the new number by the original number
308 - 971 = -663
-663 ÷ 971 = -0.6828012358393409
-0.6828012358393409 x 100 = -68.28%