-85.78% is the change from 218 to 31
Calculation steps:
[( 31 - 218 ) ÷ 218] x 100 = -85.78%
Formula
Percentage change = [(31 - 218) / 218] x 100
Subtract the new number by the original number
31 - 218 = -187
-187 ÷ 218 = -0.8577981651376146
-0.8577981651376146 x 100 = -85.78%