-19.96% is the change from 957 to 766
Calculation steps:
[( 766 - 957 ) ÷ 957] x 100 = -19.96%
Formula
Percentage change = [(766 - 957) / 957] x 100
Subtract the new number by the original number
766 - 957 = -191
-191 ÷ 957 = -0.19958202716823406
-0.19958202716823406 x 100 = -19.96%