-87.12% is the change from 233 to 30
Calculation steps:
[( 30 - 233 ) ÷ 233] x 100 = -87.12%
Formula
Percentage change = [(30 - 233) / 233] x 100
Subtract the new number by the original number
30 - 233 = -203
-203 ÷ 233 = -0.871244635193133
-0.871244635193133 x 100 = -87.12%