-5.15% is the change from 233 to 221
Calculation steps:
[( 221 - 233 ) ÷ 233] x 100 = -5.15%
Formula
Percentage change = [(221 - 233) / 233] x 100
Subtract the new number by the original number
221 - 233 = -12
-12 ÷ 233 = -0.05150214592274678
-0.05150214592274678 x 100 = -5.15%