-85.31% is the change from 211 to 31
Calculation steps:
[( 31 - 211 ) ÷ 211] x 100 = -85.31%
Formula
Percentage change = [(31 - 211) / 211] x 100
Subtract the new number by the original number
31 - 211 = -180
-180 ÷ 211 = -0.8530805687203792
-0.8530805687203792 x 100 = -85.31%