-81.84% is the change from 391 to 71
Calculation steps:
[( 71 - 391 ) ÷ 391] x 100 = -81.84%
Formula
Percentage change = [(71 - 391) / 391] x 100
Subtract the new number by the original number
71 - 391 = -320
-320 ÷ 391 = -0.8184143222506394
-0.8184143222506394 x 100 = -81.84%