-86.1% is the change from 223 to 31
Calculation steps:
[( 31 - 223 ) ÷ 223] x 100 = -86.1%
Formula
Percentage change = [(31 - 223) / 223] x 100
Subtract the new number by the original number
31 - 223 = -192
-192 ÷ 223 = -0.8609865470852018
-0.8609865470852018 x 100 = -86.1%