-83.92% is the change from 970 to 156
Calculation steps:
[( 156 - 970 ) ÷ 970] x 100 = -83.92%
Formula
Percentage change = [(156 - 970) / 970] x 100
Subtract the new number by the original number
156 - 970 = -814
-814 ÷ 970 = -0.8391752577319588
-0.8391752577319588 x 100 = -83.92%