-68.49% is the change from 971 to 306
Calculation steps:
[( 306 - 971 ) ÷ 971] x 100 = -68.49%
Formula
Percentage change = [(306 - 971) / 971] x 100
Subtract the new number by the original number
306 - 971 = -665
-665 ÷ 971 = -0.6848609680741503
-0.6848609680741503 x 100 = -68.49%