-81.44% is the change from 970 to 180
Calculation steps:
[( 180 - 970 ) ÷ 970] x 100 = -81.44%
Formula
Percentage change = [(180 - 970) / 970] x 100
Subtract the new number by the original number
180 - 970 = -790
-790 ÷ 970 = -0.8144329896907216
-0.8144329896907216 x 100 = -81.44%