-20.52% is the change from 970 to 771
Calculation steps:
[( 771 - 970 ) ÷ 970] x 100 = -20.52%
Formula
Percentage change = [(771 - 970) / 970] x 100
Subtract the new number by the original number
771 - 970 = -199
-199 ÷ 970 = -0.20515463917525772
-0.20515463917525772 x 100 = -20.52%