-85.78% is the change from 211 to 30
Calculation steps:
[( 30 - 211 ) ÷ 211] x 100 = -85.78%
Formula
Percentage change = [(30 - 211) / 211] x 100
Subtract the new number by the original number
30 - 211 = -181
-181 ÷ 211 = -0.8578199052132701
-0.8578199052132701 x 100 = -85.78%