-81.7% is the change from 388 to 71
Calculation steps:
[( 71 - 388 ) ÷ 388] x 100 = -81.7%
Formula
Percentage change = [(71 - 388) / 388] x 100
Subtract the new number by the original number
71 - 388 = -317
-317 ÷ 388 = -0.8170103092783505
-0.8170103092783505 x 100 = -81.7%