-83.2% is the change from 970 to 163
Calculation steps:
[( 163 - 970 ) ÷ 970] x 100 = -83.2%
Formula
Percentage change = [(163 - 970) / 970] x 100
Subtract the new number by the original number
163 - 970 = -807
-807 ÷ 970 = -0.831958762886598
-0.831958762886598 x 100 = -83.2%