-81.04% is the change from 211 to 40
Calculation steps:
[( 40 - 211 ) ÷ 211] x 100 = -81.04%
Formula
Percentage change = [(40 - 211) / 211] x 100
Subtract the new number by the original number
40 - 211 = -171
-171 ÷ 211 = -0.8104265402843602
-0.8104265402843602 x 100 = -81.04%