-76.19% is the change from 970 to 231
Calculation steps:
[( 231 - 970 ) ÷ 970] x 100 = -76.19%
Formula
Percentage change = [(231 - 970) / 970] x 100
Subtract the new number by the original number
231 - 970 = -739
-739 ÷ 970 = -0.7618556701030927
-0.7618556701030927 x 100 = -76.19%