-91.34% is the change from 231 to 20
Calculation steps:
[( 20 - 231 ) ÷ 231] x 100 = -91.34%
Formula
Percentage change = [(20 - 231) / 231] x 100
Subtract the new number by the original number
20 - 231 = -211
-211 ÷ 231 = -0.9134199134199135
-0.9134199134199135 x 100 = -91.34%