-83.71% is the change from 970 to 158
Calculation steps:
[( 158 - 970 ) ÷ 970] x 100 = -83.71%
Formula
Percentage change = [(158 - 970) / 970] x 100
Subtract the new number by the original number
158 - 970 = -812
-812 ÷ 970 = -0.8371134020618557
-0.8371134020618557 x 100 = -83.71%