-90.83% is the change from 229 to 21
Calculation steps:
[( 21 - 229 ) ÷ 229] x 100 = -90.83%
Formula
Percentage change = [(21 - 229) / 229] x 100
Subtract the new number by the original number
21 - 229 = -208
-208 ÷ 229 = -0.9082969432314411
-0.9082969432314411 x 100 = -90.83%