-83.61% is the change from 970 to 159
Calculation steps:
[( 159 - 970 ) ÷ 970] x 100 = -83.61%
Formula
Percentage change = [(159 - 970) / 970] x 100
Subtract the new number by the original number
159 - 970 = -811
-811 ÷ 970 = -0.8360824742268042
-0.8360824742268042 x 100 = -83.61%