-9.01% is the change from 233 to 212
Calculation steps:
[( 212 - 233 ) ÷ 233] x 100 = -9.01%
Formula
Percentage change = [(212 - 233) / 233] x 100
Subtract the new number by the original number
212 - 233 = -21
-21 ÷ 233 = -0.09012875536480687
-0.09012875536480687 x 100 = -9.01%