-76.21% is the change from 971 to 231
Calculation steps:
[( 231 - 971 ) ÷ 971] x 100 = -76.21%
Formula
Percentage change = [(231 - 971) / 971] x 100
Subtract the new number by the original number
231 - 971 = -740
-740 ÷ 971 = -0.7621009268795057
-0.7621009268795057 x 100 = -76.21%