-21.03% is the change from 970 to 766
Calculation steps:
[( 766 - 970 ) ÷ 970] x 100 = -21.03%
Formula
Percentage change = [(766 - 970) / 970] x 100
Subtract the new number by the original number
766 - 970 = -204
-204 ÷ 970 = -0.21030927835051547
-0.21030927835051547 x 100 = -21.03%