-91.65% is the change from 970 to 81
Calculation steps:
[( 81 - 970 ) ÷ 970] x 100 = -91.65%
Formula
Percentage change = [(81 - 970) / 970] x 100
Subtract the new number by the original number
81 - 970 = -889
-889 ÷ 970 = -0.9164948453608247
-0.9164948453608247 x 100 = -91.65%