-81.94% is the change from 216 to 39
Calculation steps:
[( 39 - 216 ) ÷ 216] x 100 = -81.94%
Formula
Percentage change = [(39 - 216) / 216] x 100
Subtract the new number by the original number
39 - 216 = -177
-177 ÷ 216 = -0.8194444444444444
-0.8194444444444444 x 100 = -81.94%